java 只读list java只读方式打开文件

在java编程中，如何设置文件为只读？

此示例演示如何使用File类的file.setReadOnly()和file.canWrite()方法设置文件为只读模式。

package com.yiibai; import java.io.File; public class ReadOnlyFile { public static void main(String[] args) { File file = new File("F:/worksp/javaexamples/java_files/myfile.txt"); System.out.println(file.setReadOnly()); System.out.println(file.canWrite()); } }

执行上述示例代码，将产生以下结果 –

true false

示例-2

以下是java中设置文件只读的另一个示例

package com.yiibai; import java.io.File; import java.io.IOException; public class ReadOnlyFile2 { public static void main(String[] args) throws IOException { File file = new File("F:/worksp/javaexamples/java_files/myfile.txt"); file.setReadOnly(); if (file.canWrite()) { System.out.println("This file is writable"); } else { System.out.println("This file is read only"); } file.setWritable(true); if (file.canWrite()) { System.out.println("This file is writable"); } else { System.out.println("This file is read only"); } } }

执行上述示例代码，将产生以下结果 –

This file is read only This file is writable