java 列出目录下的文件夹或所有文件

public class TestListFile {

	public static void main(String[] args) {
		System.out.println("=========指定目录下的所有文件夹==========");
		File fileDirectory = new File("E:\");
		for (File temp : fileDirectory.listFiles()) {
			if (temp.isDirectory()) {
				System.out.println(temp.toString());
			}
		}
		System.out.println("=========指定目录下的所有文件==========");
		File file = new File("E:\TestListFile\a");
		File[] aa = file.listFiles();
		for (int i = 0; i < aa.length; i++) {
			if (aa[i].isFile()) {
				System.out.println(aa[i]);
			}
		}
	}
}public class TestListFile {

	public static voi