Java PrintWriter

1 什么是Java PrintWriter

Java PrintWriter类是Writer类的实现。它用于将格式化的对象表示形式打印到文本输出流。

2 Java PrintWriter的语法

public class PrintWriter extends Writer  

3 Java PrintWriter的方法

4 Java PrintWriter的例子

让我们看一下使用Java PrintWriter类在控制台和文本文件test.txt中写入数据的简单示例。

package com.yiidian;

/**
 * 一点教程网： http://www.yiidian.com
 */
/**
 *  Java PrintWriter的例子
 */
import java.io.File;
import java.io.PrintWriter;

public class Demo {

    public static void main(String[] args) throws Exception {
        //Data to write on Console using PrintWriter
        PrintWriter writer = new PrintWriter(System.out);
        writer.write("Yiidian provides tutorials of all technology.");
        writer.flush();
        writer.close();
        //Data to write in File using PrintWriter
        PrintWriter writer1 =null;
        writer1 = new PrintWriter(new File("D:\\yiidian\\test.txt"));
        writer1.write("Like Java, Spring, Hibernate, Android, PHP etc.");
        writer1.flush();
        writer1.close();
    }
}

输出结果为：

Yiidian provides tutorials of all technology.

test.txt:

Like Java, Spring, Hibernate, Android, PHP etc.