Use of file class

Common constructors ：

  

 

 

package File;

import org.junit.Test;

import java.io.File;

public class FileTest {
    @Test
    public void test1(){
//         How to create File Class ： Constructor one ：
//         Relative to current module
//        ( Relative paths ) Compared with a certain path 

        File file1 = new File("hello.txt");
//        ( Absolute path ) The path to the file or file directory that contains the drive letter 
        File file2 = new File("D:\\java project\\day07\\he.txt");
    }
    @Test
    public void test2(){
//         Constructors 2：
        File file3 = new File("D:\\java project","day07");

//         Constructors 3：
        File file4 = new File(file3,"hi.txt");
        
    }
}