文件过滤

package filetest;

import java.io.File;
import java.io.FilenameFilter;

public class FileDemo2 {

public static void main(String[] args) {
File dir = new File("C:\\Users\\Administrator\\Desktop\\day20");
String[] arr = dir.list(new FilenameFilter() {

@Override
public boolean accept(File dir, String name) {
return name.endsWith(".java");
}
});

for (String name : arr) {
System.out.println(name);
}
}
}