100个Java经典例子(51-60)初学者的利器高手的宝典JavaSE
2011-11-07 22:37
591 查看
package test51; //文件名:ChatClient.java import java.net.*; import java.io.*; /** * Title: 网络聊天吧 * Description: 这是一个使用数据报通讯方式的聊天程序的客户端 * : * Filename: ChatClient.java * * */ public class ChatClient{ private DatagramSocket s; private InetAddress hostAddress; private byte[] buf = new byte[1000]; private DatagramPacket dp = new DatagramPacket(buf,buf.length); /** *方法说明:构造器,这里实现接收用户输入和与服务器通讯 *输入参数: *返回类型: */ public ChatClient(){ try{ //使用构造器,创建使用本机任何可用端口的数据包Socket s = new DatagramSocket(); //获取本地IP hostAddress = InetAddress.getByName("localhost"); System.out.println("Client start............"); while(true){ String outMessage =""; //读取输入 BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in)); try{ outMessage = stdin.readLine(); }catch(IOException ie){ System.err.println("IO error!"); } //如果输入“bye”则表示退出程序 if(outMessage.equals("bye")) break; String outString = "Client say: "+ outMessage; byte[] buf = outString.getBytes(); //打包数据,发送数据 DatagramPacket out = new DatagramPacket(buf,buf.length,hostAddress,ChatServer.PORT); s.send(out); //等待服务器返回 s.receive(dp); String rcvd = "rcvd from "+ dp.getAddress() + ", " + dp.getPort() + ": "+ new String(dp.getData(),0,dp.getLength()); System.out.println(rcvd); } }catch(UnknownHostException e){ System.out.println("Can;t open socket"); System.exit(1); }catch(SocketException e){ System.out.println("Can;t open socket"); e.printStackTrace(); System.exit(1); }catch(IOException e){ System.err.println("Communication error"); e.printStackTrace(); System.exit(1); }catch(Exception e){ System.err.println("Communication error"); e.printStackTrace(); System.exit(1); } System.out.println("ChatClient over"); } /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(String[] args){ new ChatClient(); } }
package test51; import java.net.*; import java.io.*; import java.util.*; /** * Title: 网络聊天吧 * Description: 使用数据报创建的聊天服务器 * : * Filename: ChatServer.java * * */ public class ChatServer{ static final int PORT = 4000;//设置服务端口 private byte[] buf = new byte[1000]; private DatagramPacket dgp =new DatagramPacket(buf,buf.length); private DatagramSocket sk; /** *方法说明:服务端构造器,实现读取用户输入和通讯 *输入参数: *返回类型: */ public ChatServer(){ try{ //实例化数据报 sk = new DatagramSocket(PORT); System.out.println("Server start................."); while(true){ //等待接收 sk.receive(dgp); //获取接收信息 String rcvd = new String(dgp.getData(),0,dgp.getLength())+ ", from address: "+ dgp.getAddress()+ ", port: "+ dgp.getPort(); System.out.println(rcvd); String outMessage =""; //读取输入 BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in)); try{ outMessage = stdin.readLine(); }catch(IOException ie){ System.err.println("IO error!"); } String outString = "Server say: "+ outMessage; //拷贝字符到缓存 byte[] buf = outString.getBytes(); //打包数据,发送回信息。 DatagramPacket out = new DatagramPacket(buf,buf.length,dgp.getAddress(),dgp.getPort()); sk.send(out); } }catch(SocketException e){ System.err.println("Can't open socket"); System.exit(1); }catch(IOException e){ System.err.println("Communication error"); e.printStackTrace(); System.exit(1); } } public static void main(String[] args){ new ChatServer(); } }
package test52; import java.sql.*; /** * Title: ODBC连接数据库 * Description: 本实例演示如何使用JDBC-ODBC桥操作数据库。 * : * Filename: odbcConn.java * * */ public class odbcConn{ private String url=""; private String username=""; private String password=""; /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection con = DriverManager.getConnection(url, username, password); return con; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:执行查询SQL语句 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void query(Connection con, String sql){ try{ if(con==null) return; Statement stmt = con.createStatement(); ResultSet rs = stmt.executeQuery(sql); ResultSetMetaData rmeta = rs.getMetaData(); int numColumns = rmeta.getColumnCount(); while(rs.next()) { for(int i = 0;i< numColumns;i++) { String sTemp = rs.getString(i+1); System.out.print(sTemp+" "); } System.out.println(""); } }catch(Exception e){ System.out.println("query error:"+e); }finally{ try{ con.close(); }catch(SQLException se){} } } /** *方法说明:执行插入、更新、删除等没有返回结果集的SQL语句 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void execute(Connection con, String sql){ try{ if(con==null) return; Statement stmt = con.createStatement(); stmt.executeUpdate(sql); }catch(Exception e){ System.out.println("query error:"+e); }finally{ try{ con.close(); }catch(SQLException se){} } } /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(String[] arg){ if(arg.length!=3){ System.out.println("use: java odbcConn url username password"); return; } odbcConn oc = new odbcConn(); oc.url = arg[0]; oc.username=arg[1]; oc.password=arg[2]; oc.execute(oc.conn(),"insert into userinfo(name,address)values('switch','new York')"); oc.query(oc.conn(),"select * from userinfo"); } }
package test53; import java.sql.*; /** * Title: JDBC连接数据库 * Description: 本实例演示如何使用JDBC连接Oracle数据库,并演示添加数据和查询数据。 * : * Filename: JDBCConn.java * * */ public class JDBCConn{ private String url=""; private String username=""; private String password=""; /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { //加载JDBC驱动 Class.forName("oracle.jdbc.driver.OracleDriver"); //创建数据库连接 Connection con = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:ORCL", "test", "test"); return con; }catch(ClassNotFoundException cnf){ System.out.println("driver not find:"+cnf); return null; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:执行查询SQL语句 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void query(Connection con, String sql){ try{ if(con==null){ throw new Exception("database connection can't use!"); } if(sql==null) throw new Exception("check your parameter: 'sql'! don't input null!"); //声明语句 Statement stmt = con.createStatement(); //执行查询 ResultSet rs = stmt.executeQuery(sql); ResultSetMetaData rmeta = rs.getMetaData(); //获得数据字段个数 int numColumns = rmeta.getColumnCount(); while(rs.next()) { for(int i = 0;i< numColumns;i++) { String sTemp = rs.getString(i+1); System.out.print(sTemp+" "); } System.out.println(""); } }catch(Exception e){ System.out.println("query error:"+e); } } /** *方法说明:执行插入、更新、删除等没有返回结果集的SQL语句 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void execute(Connection con, String sql){ try{ if(con==null) return; Statement stmt = con.createStatement(); stmt.executeUpdate(sql); }catch(Exception e){ System.out.println("execute error: sql = "+sql); System.out.println(e); } } /** *方法说明:实例演示 *输入参数: *返回类型: */ public void demo(){ try{ JDBCConn oc = new JDBCConn(); Connection conn = oc.conn(); String sql = "insert into TBL_USER(id,name,password)values(seq_user.nextval,'switch','haorenpingan')"; oc.execute(conn,sql); sql = "select * from TBL_USER"; oc.query(conn,sql); conn.close(); }catch(SQLException se){ System.out.println(se); }catch(Exception e){ System.out.println(e); } } /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(String[] arg){ if(arg.length!=3){ System.out.println("use: java JDBCConn url username password"); return; } JDBCConn oc = new JDBCConn(); oc.url = arg[0]; oc.username=arg[1]; oc.password=arg[2]; oc.demo(); } }
package test54; import java.sql.*; import java.util.*; /** * Title: 使用语句 * Description: 本实例演示使用语句方式查询数据库操作。语句是一种预处理的执行方法。 * : * Filename: StatementConn.java * * */ public class StatementConn{ private static String url=""; private static String username=""; private static String password=""; Connection con = null; PreparedStatement updStmt=null;//语句对象 /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { //加载JDBC驱动 Class.forName("oracle.jdbc.driver.OracleDriver"); //创建数据库连接 con = DriverManager.getConnection(url, username, password); return con; }catch(ClassNotFoundException cnf){ System.out.println("driver not find:"+cnf); return null; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:关闭数据库 *输入参数: *返回类型: */ public void close() { try { con.close(); } catch(Throwable e){ System.out.println(e); } con = null; } /** *方法说明:语句执行 *输入参数: *返回类型: */ private PreparedStatement getStatement(String sql,Vector vCondition) throws SQLException{ try { int i=0; Object temp; updStmt=conn().prepareStatement(sql); for (i=0;i<vCondition.size();i++){ temp=vCondition.elementAt(i); if (temp instanceof Integer) { updStmt.setInt(i+1,((Integer)temp).intValue()); } else if (temp instanceof Double) { updStmt.setDouble(i+1,((Double)temp).doubleValue()); } else if (temp instanceof String) { String str=(temp.toString()).trim(); updStmt.setString(i+1,str); } else { updStmt.setObject(i+1,temp); } } } catch(SQLException e) { throw e; } return updStmt; } /** *方法说明:关闭语句对象 *输入参数: *返回类型: */ private void closeUpdStmt() { try { if(updStmt!=null) updStmt.close(); } catch(Throwable e) { System.out.println(e); } updStmt=null; } /** *方法说明:执行SQL *输入参数: *返回类型: */ public Object execute(String sql,Vector vCondition) throws SQLException,Exception { java.sql.ResultSet rs = null; java.util.Vector vResult = null; try { if(!isSelect(sql)) { //insert,update,delete try { Integer iResult=new Integer(getStatement(sql,vCondition).executeUpdate()); return iResult; } catch(SQLException e1) { throw e1; } } else { //select rs = getStatement(sql,vCondition).executeQuery(); int columnCount = rs.getMetaData().getColumnCount(); vResult = new Vector(); while(rs.next()) { Vector vTemp = new Vector(); for(int i = 0;i< columnCount;i++) { String sTemp = rs.getString(i+1); vTemp.addElement(sTemp== null ? "" : sTemp.trim()); } vResult.addElement(vTemp); } rs.close(); closeUpdStmt(); } } catch(Exception e1) { throw e1; } finally { close(); } return vResult; } /** *方法说明: *输入参数: *返回类型: */ protected boolean isSelect(String psql) { String sql = psql.trim().toUpperCase(); if(sql.indexOf("SELECT") != 0) return false; return true; } /** *方法说明: *输入参数: *返回类型: */ public static void main(String[] arg){ if(arg.length!=3){ System.out.println("use: java StatementConn url username password"); return; } url = arg[0]; username=arg[1]; password=arg[2]; demo(); } /** *方法说明:演示方法 *输入参数: *返回类型: */ public static void demo(){ try{ StatementConn oc = new StatementConn(); String sql = "select * from TBL_USER where id>?"; Vector vCondition =new Vector(); vCondition.addElement(new Integer(3)); Vector vResult = (Vector)oc.execute(sql,vCondition); for(int i=0;i<vResult.size();i++){ System.out.println(vResult.elementAt(i)); } }catch(Exception e){ System.out.println(e); } } }//end
package test56; import java.sql.*; /** * Title: 数据库元数据 * Description: 使用数据库元数据对象获取数据库信息。 * : * Filename: JDBCDataMeta.java * * */ public class JDBCDataMeta { private String url=""; private String username=""; private String password=""; /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(java.lang.String[] args) { if(args.length!=4){ System.out.println("use: java JDBCDataMeta url username password tablename"); return; } JDBCDataMeta JDM = new JDBCDataMeta(); JDM.url = args[0]; JDM.username=args[1]; JDM.password=args[2]; JDM.getMeta(JDM.conn(),args[3]); } /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { Class.forName("oracle.jdbc.driver.OracleDriver"); Connection con = DriverManager.getConnection(url, username, password); return con; }catch(ClassNotFoundException cf){ System.out.println("can't find class"+cf); return null; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:获取数据元数据信息 *输入参数:Connection con 数据库连接 *输入参数:String table 表名称 *返回类型: */ public void getMeta(Connection con, String table){ try { DatabaseMetaData dbmd = con.getMetaData(); //获取驱动名 String dataName = dbmd.getDriverName(); String dataURL = dbmd.getURL(); System.out.println("**************** DATA META Comment *********************"); System.out.println("dataName="+dataName); System.out.println("dataURL="+dataURL); //获取数据库最大支持字节数 int dataMaxSize = dbmd.getMaxRowSize(); System.out.println("dataMaxSize="+dataMaxSize); //获取数据库表信息 String[] types = new String[1]; types[0] = "TABLE"; ResultSet results = dbmd.getTables(null, null, "%", types); System.out.println("********************tables information********************"); while (results.next()) { System.err.println("----------------------------"); System.err.println("TABLE_CAT : "+results.getObject(1)); System.err.println("TABLE_SCHEM : "+results.getObject(2)); System.err.println("TABLE_NAME : "+results.getObject(3)); System.err.println("TABLE_TYPE : "+results.getObject(4)); System.err.println("REMARKS : "+results.getObject(5)); } //获取表主键信息 ResultSet pkRSet = dbmd.getPrimaryKeys(null, null, table); System.out.println("********************PK information********************"); while(pkRSet.next()){ System.err.println("TABLE_CAT : "+pkRSet.getObject(1)); System.err.println("TABLE_SCHEM: "+pkRSet.getObject(2)); System.err.println("TABLE_NAME : "+pkRSet.getObject(3)); System.err.println("COLUMN_NAME: "+pkRSet.getObject(4)); System.err.println("KEY_SEQ : "+pkRSet.getObject(5)); System.err.println("PK_NAME : "+pkRSet.getObject(6)); } System.out.println("*****************FK information***********************"); //获取表外键信息 results = dbmd.getImportedKeys(null, null, table); while (results.next()) { System.err.println("PKTABLE_CAT : "+results.getObject(1)); System.err.println("PKTABLE_SCHEM : "+results.getObject(2)); System.err.println("PKTABLE_NAME : "+results.getObject(3)); System.err.println("PKCOLUMN_NAME : "+results.getObject(4)); System.err.println("FKTABLE_CAT : "+results.getObject(5)); System.err.println("FKTABLE_SCHEM : "+results.getObject(6)); System.err.println("FKTABLE_NAME : "+results.getObject(7)); System.err.println("FKCOLUMN_NAME : "+results.getObject(8)); System.err.println("KEY_SEQ : "+results.getObject(9)); System.err.println("UPDATE_RULE : "+results.getObject(10)); System.err.println("DELETE_RULE : "+results.getObject(11)); System.err.println("FK_NAME : "+results.getObject(12)); System.err.println("PK_NAME : "+results.getObject(13)); System.err.println("DEFERRABILITY : "+results.getObject(13)); } }catch (SQLException se) { // 输出数据库连接错误信息 System.out.println("SQL Exception: " + se.getMessage()); se.printStackTrace(System.out); }catch(Exception e){ System.out.println(e); }finally{ try{ con.close(); }catch(SQLException se){} } } }
package test57; import java.sql.*; /** * Title: 结果集元数据 * Description: 使用结果集元数据对象获取数据库信息。 * : * Filename: JDBCResultMeta.java * * */ public class JDBCResultMeta { private String url=""; private String username=""; private String password=""; /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(java.lang.String[] args) { if(args.length!=4){ System.out.println("use: java JDBCResultMeta url username password tablename"); return; } JDBCResultMeta JRM = new JDBCResultMeta(); JRM.url = args[0]; JRM.username=args[1]; JRM.password=args[2]; JRM.getMeta(JRM.conn(),args[3]); } /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { Class.forName("oracle.jdbc.driver.OracleDriver"); Connection con = DriverManager.getConnection(url, username, password); return con; }catch(ClassNotFoundException cf){ System.out.println("can't find class"+cf); return null; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:获取结果集元数据信息 *输入参数:Connection con 数据库连接 *输入参数:String table 表名称 *返回类型: */ public void getMeta(Connection con, String table){ try { Statement Stm = con.createStatement(); String sql="select * from "+table; ResultSet rs = Stm.executeQuery(sql); ResultSetMetaData lineInfo = rs.getMetaData(); System.out.println("*********************RESULT META Comment************************"); //获取数据列数 int columnCount = lineInfo.getColumnCount(); System.out.println("Column Count :"+columnCount); //获取数据列类型 for(int i=1;i<columnCount+1;i++){ String columeName = lineInfo.getColumnName(i); String columeType = lineInfo.getColumnTypeName(i); boolean autocol = lineInfo.isAutoIncrement(i); System.out.println(columeName+" = "+columeType +" ::: "+autocol); } }catch (SQLException se) { // 输出数据库连接错误信息 System.out.println("SQL Exception: " + se.getMessage()); se.printStackTrace(System.out); }catch(Exception e){ System.out.println(e); }finally{ try{ con.close(); }catch(SQLException se){} } } }
package test58; import java.sql.*; /** * Title: JDBC连接数据库 * Description: 本实例演示如何使用JDBC连接Oracle数据库,并演示添加数据和查询数据。 * : * Filename: JDBCSTMConn.java * * */ public class JDBCSTMConn{ private static String url=""; private static String username=""; private static String password=""; /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { //加载JDBC驱动 Class.forName("oracle.jdbc.driver.OracleDriver"); //创建数据库连接 Connection con = DriverManager.getConnection(url, username, password); return con; }catch(ClassNotFoundException cnf){ System.out.println("driver not find:"+cnf); return null; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:调用存储过程,察看数据结果 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void execute(Connection con){ CallableStatement toesUp = null; try { con.setAutoCommit(false); //调用存储过程 toesUp = con.prepareCall("{call p_test(?)}"); //传递参数给存储过程 toesUp.setInt(1, 6); //执行存储过程 toesUp.executeQuery(); Statement stmt = con.createStatement(); ResultSet rs = (ResultSet) stmt.executeQuery("SELECT * FROM TEST"); while (rs.next()) { String ID = rs.getString(1); String NAME = rs.getString(2); System.out.println(ID+ " " +NAME); } rs.close(); } catch (SQLException e) { System.out.println(e); try{ toesUp.close(); con.close(); }catch(Exception es){System.out.println(es);} } } /** *方法说明:实例演示 *输入参数: *返回类型: */ public void demo(){ try{ JDBCSTMConn oc = new JDBCSTMConn(); Connection conn = oc.conn(); oc.execute(conn); conn.close(); }catch(SQLException se){ System.out.println(se); }catch(Exception e){ System.out.println(e); } } /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(String[] arg){ if(arg.length!=3){ System.out.println("use: java JDBCSTMConn url username password"); return; } JDBCSTMConn oc = new JDBCSTMConn(); oc.url = arg[0]; oc.username=arg[1]; oc.password=arg[2]; oc.demo(); } }
package test59; import java.sql.*; /** * Title: JDBC连接数据库 * Description: 本实例演示如何使用JDBC连接Oracle数据库,并演示添加数据和查询数据。 * : * Filename: JDBCConnCommit.java * * */ public class JDBCConnCommit{ private static String url=""; private static String username=""; private static String password=""; /** *方法说明:获得数据连接 *输入参数: *返回类型:Connection 连接对象 */ public Connection conn(){ try { //加载JDBC驱动 Class.forName("oracle.jdbc.driver.OracleDriver"); //创建数据库连接 Connection con = DriverManager.getConnection(url, username, password); return con; }catch(ClassNotFoundException cnf){ System.out.println("driver not find:"+cnf); return null; }catch(SQLException sqle){ System.out.println("can't connection db:"+sqle); return null; } catch (Exception e) { System.out.println("Failed to load JDBC/ODBC driver."); return null; } } /** *方法说明:执行查询SQL语句 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void query(Connection con, String sql) throws SQLException,Exception { try{ if(con==null){ throw new Exception("database connection can't use!"); } if(sql==null) throw new Exception("check your parameter: 'sql'! don't input null!"); //声明语句 Statement stmt = con.createStatement(); //执行查询 ResultSet rs = stmt.executeQuery(sql); ResultSetMetaData rmeta = rs.getMetaData(); //获得数据字段个数 int numColumns = rmeta.getColumnCount(); while(rs.next()) { for(int i = 0;i< numColumns;i++) { String sTemp = rs.getString(i+1); System.out.print(sTemp+" "); } System.out.println(""); } rs.close(); stmt.close(); }catch(Exception e){ System.out.println("query error: sql = "+sql); System.out.println("query error:"+e); throw new SQLException("query error"); } } /** *方法说明:执行插入、更新、删除等没有返回结果集的SQL语句 *输入参数:Connection con 数据库连接 *输入参数:String sql 要执行的SQL语句 *返回类型: */ public void execute(Connection con, String sql) throws SQLException { try{ if(con==null) return; Statement stmt = con.createStatement(); int i = stmt.executeUpdate(sql); System.out.println("update row:"+i); stmt.close(); }catch(Exception e){ System.out.println("execute error: sql = "+sql); System.out.println(e); throw new SQLException("execute error"); } } /** *方法说明:实例演示 *输入参数: *返回类型: */ public void demo(){ JDBCConnCommit oc = new JDBCConnCommit(); Connection conn = oc.conn(); try{ conn.setAutoCommit( false ); String sql = ""; for(int i=0;i<4;i++){ sql = "insert into TBL_USER(id,name,password)values(seq_user.nextval,'tom','haorenpingan')"; oc.execute(conn,sql); } sql = "select * from TBL_USER where name='tom' order by id"; oc.query(conn,sql); sql = "delete from TBL_USER where name='tom'"; oc.execute(conn,sql); conn.commit(); }catch(SQLException se){ try{ conn.rollback(); }catch(Exception e){ } System.out.println(se); }catch(Exception e){ System.out.println(e); }finally { try{ conn.close(); }catch(SQLException e){} } } /** *方法说明:主方法 *输入参数: *返回类型: */ public static void main(String[] arg){ if(arg.length!=3){ System.out.println("use: java JDBCConnCommit url username password"); return; } JDBCConnCommit oc = new JDBCConnCommit(); oc.url = arg[0]; oc.username=arg[1]; oc.password=arg[2]; oc.demo(); } }
package test60; /** * Title: 继承Thread,实现线程 * Description: 通过继承Thread类,实现其run方法,实现自己的线程 * : * Filename: oneThread.java * * */ public class oneThread extends Thread { /** *方法说明:构造器,本类没有使用 *输入参数: *返回类型: */ public oneThread() { } /** *方法说明:继承Thread类必须实现的方法,当调用start方法时运行本方法 *输入参数: *返回类型: */ public void run() { System.out.println("...............oneThread begining................"); int flag = 0; while(true) { if(flag==20){ System.out.println("\n...............oneThread end............. "); break; } for(int i=0;i<flag;i++) System.out.print("*"); System.out.println(""); flag++; try{ //睡眠0.1秒 sleep(100); }catch(Exception e){ } } } /** *方法说明:主方法。启动本线程 *输入参数: *返回类型: */ public static void main(String args[]) { new oneThread().start(); } }
相关文章推荐
- 100个Java经典例子(31-40)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(41-50)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(21-30)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(1-10)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(31-40)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(41-50)初学者的利器高手的宝典JavaSE
- 100个Java经典例子--初学者的利器高手的宝典JavaSE
- 100个Java经典例子(1-10)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(1-10)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(11-20)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(21-30)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(41-50)初学者的利器高手的宝典JavaSE
- java--100个Java经典例子(11-20)初学者的利器高手的宝典JavaSE
- java--100个Java经典例子(21-30)初学者的利器高手的宝典JavaSE
- 100个Java经典例子(11-20)初学者的利器高手的宝典JavaSE
- java--100个Java经典例子(1-10)初学者的利器高手的宝典JavaSE
- java se tutorials 里面的一个很简单的例子,高手请指点一下
- 一个经典例子让你彻彻底底理解java回调机制
- 你感觉你是个JAVA高手吗,那么就来挑战一下吧,下面可是ACM一道很经典的题目,试一吧!
- Java中前期绑定和后期绑定的一些经典例子