装饰类PrintStream实例浅析

xiaoxiao2021-02-28  9

import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.PrintStream; public class Main05 { public static void main(String[] args) { try { PrintStream ps = new PrintStream(new FileOutputStream(new File("src//JavaIO//test.txt"))); /*相当于:File file = new File("src//JavaIO//test.txt"); FileOutputStream fos = new FileOutputStream(file); PrintStream ps = new PrintStream(fos);*/ ps.print("hello "); ps.println("word!!!"); ps.println("1 + 1 = "+2); String name = "李小龙"; int age = 37; float weight = 68.45f; char sex = 'M'; ps.printf("姓名:%s;年龄:%d;体重:%f;性别:%c",name,age,weight,sex); ps.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

test.txt文档:

hello word!!! 1 + 1 = 2 姓名:李小龙;年龄:37;体重:68.449997;性别:M

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