Java获取指定文件夹内的全部文件名称

import java.io.File;
import java.io.FilenameFilter;
import java.util.Arrays;

public class Test {
public static void main(String[] args) {
//C:盘下的所有文件，包括文件夹
String[] filenames = new File("C:/").list();
System.out.println(Arrays.toString(filenames));
//C:盘下后缀名为txt的文件
String[] filenames2 = new File("C:/").list(new FilenameFilter() {
public boolean accept(File dir, String name) {
return name.endsWith(".txt");
}
});
System.out.println(Arrays.toString(filenames2));
//C:盘下所有目录
String[] filenames3 = new File("C:/").list(new FilenameFilter() {
public boolean accept(File dir, String name) {
return new File(dir, name).isDirectory();
}
});
System.out.println(Arrays.toString(filenames3));
}
}