boolean delete static File createTempFile(String prefix, String suffix, File directory) void deleteOnExit 描述 所述java.io.File.delete()方法删除由抽象路径名定义的文件或目录。要删除目录,该目录必须为空。 声明 以下是java.io.File.delete()方法的声明 public boolean delete() 参数 NA 返回值 如果成功删除文件,则此方法返回true,否则返回false。 异常 SecurityException - 如果SecurityManager.checkWrite(java.lang.String)方法拒绝对文件的删除访问 实例 以下示例显示了java.io.File.delete()方法的用法。 package com.tutorialspoint; import java.io.File; public class FileDemo { public static void main(String[] args) { File f = null; boolean bool = false; try { // create new file f = new File("test.txt"); // tries to delete a non-existing file bool = f.delete(); // prints System.out.println("File deleted: "+bool); // creates file in the system f.createNewFile(); // createNewFile() is invoked System.out.println("createNewFile() method is invoked"); // tries to delete the newly created file bool = f.delete(); // print System.out.println("File deleted: "+bool); } catch(Exception e) { // if any error occurs e.printStackTrace(); } } } 让我们编译并运行上面的程序,这将产生以下结果 File deleted: false createNewFile() method is invoked File deleted: true static File createTempFile(String prefix, String suffix, File directory) void deleteOnExit