读取文件中的内容将其显示出来

//读取文件中的内容将其显示出来
public class ReadFile{
public static void main(String[] args) {

int b;
byte tom[] = new byte[1000];
File file = new File("c://system.xml");
try {
FileInputStream f = new FileInputStream(file);

b = f.read(tom,0,280);
while(b!=-1){
//StringBuffer str = new StringBuffer();
String str = new String(tom,0,b);
System.out.println(str);
break;
}

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}