java-03

package homework3;
import java.io.File;
import java.io.IOException;






public class a {


public static void main(String[] args) {
File file = new File("F:/test");
file.mkdir();


File file1= new File("F:/test/aa");

file1.mkdir();


File file2 = new File("F:/test/aa.txt");
File file3 = new File("F:/test/111.txt");
File file4 = new File("F:/test/aa/aaa.txt");
try {
file2.createNewFile();
file3.createNewFile();
file4.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
String[] fileArr = file.list();

for(int i =0; i< fileArr.length; i++){
System.out.println(fileArr[i]);
}

String fileName = file.getName();
//System.out.println(fileName);
System.out.println(file.getAbsolutePath());

String[] fileArr1 = file1.list();
for(int j =0; j< fileArr1.length; j++){
System.out.println(fileArr1[j]);
}

String fileName1 = file1.getName();
//System.out.println(fileName1);

System.out.println(file1.getAbsolutePath());
}

}

package homework3;import java.io.File;public class b {public static void main(String[] args) {File file=new File("f:/test");findFile(file);}public static void findFile(File file) {File[] files = file.listFiles();for (File f:files) {System.out.println(f.getAbsolutePath());}for (int i = 0; i < files.length; i++) {if (files[i].isDirectory()) {findFile(files[i]);}}}}