第五次JAVA作业

public class zuoye {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str1="耿丹计算机Java20170320";
System.out.println(str1.substring(1));
}
}

public class zuoye1 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str = "耿丹计算机Java20170320";
String newStr = str.replaceAll("Java", "J2EE");
System.out.println("替换后："+newStr);
}

}

public class zuoye2 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str1="耿丹 计算机 Java 2017320";
String newStr = str1.replaceAll(" ", "");
System.out.println("替换后："+newStr);
}

}

public class zuoye3 {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
String str = "11010919990118xxxx";
System.out.println(str.substring(6,13));
}

}