Java implementation of creating a directory if it does not exist

This can be achieved using the exists() and mkdir() methods in the File class.

Important function introduction:

public boolean exists()

Test whether the file or directory represented by this abstract path name exists.

public boolean mkdir()

Create the directory specified by this abstract pathname.

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Specific examples are as follows:

 File file =new File("e:/cc/cc.jpg");    
//如果文件夹不存在则创建    
if  (!file .exists()  && !file .isDirectory())      
{       
    System.out.println("//不存在");  
    file .mkdir();    
} else   
{  
    System.out.println("//目录存在");  
}

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