java.io.File.deleteOnExit()-生成临时文件，删除临时文件

摘要: Java 中有时候经常需要临时文件，那么我们怎样保证生成了临时文件，而且又可以自动删除呢？
哈哈，用这个把 java.io.File.deleteOnExit()

The java.io.File.deleteOnExit() method deletes the file or directory defined by the abstract path name when the virtual machine terminates. Files or directories are deleted in the reverse order as they are registered.

Exception

SecurityException -- If SecurityManager.checkWrite(java.lang.String) method denies delete access to the file

Example

The following example shows the usage of java.io.File.deleteOnExit() method.

package com.yuan.test;

import java.io.File;

public class FileDemo {
public static void main(String[] args) {
File f = null;
try{
// creates temporary file
f = File.createTempFile("tmp", ".txt");

// prints absolute path
System.out.println("File path: "+f.getAbsolutePath());

// deletes file when the virtual machine terminate
f.deleteOnExit();

// creates temporary file
f = File.createTempFile("tmp", null);

// prints absolute path
System.out.print("File path: "+f.getAbsolutePath());

// deletes file when the virtual machine terminate
f.deleteOnExit();

}catch(Exception e){
// if any error occurs
e.printStackTrace();
}
}
}