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²âÊÔ´úÂ룺package file;
import java.io.File;
public class fileFilter {
 public static void main(String[] args) {
  File file = new File("d:\\");//ÉèÖÃÎļþ·¾¶
  for (File fileList : file.listFiles(new file.MyFileFilter())) {
   System.out.println(fileList.getName());
  }
 }
}
¹ýÂËÆ÷´úÂ룺
package file;
import java.io.File;
import java.io.FileFilter;
public class MyFileFilter implements FileFilter {
 //ʵÏÖFileFilterµÄ·½·¨
 public boolean accept(File arg0) {
  if (arg0.getName().endsWith(".class")) {
   return true;
  }
  return false;
 }
}


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String s = "Hello world!";
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JavaµÄException·ÖΪÁ½À࣬һÀàÊÇRuntimeException¼°Æä×ÓÀ࣬ÁíÍâÒ»Àà¾ÍÊÇchecked
Exception¡£JavaÒªÇóº¯Êý¶ÔûÓб»catch´¦ÀíµôµÄchecked
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public class User implements Serializable{
private static final long serialVersionUID = 1L;


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