打印流

print打印流会将基本数据类型格式化成字符串输出，对象则直接调用tostring方法

print和println是打印流的实例

实现文件复制更加简单，因为缓冲流只能写入string类型

 

package com.study02;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Date;

public class Print {
public static void main(String[] args) {

PrintStream ps = System.out;
ps.print("aaaaaaaaa");

PrintStream pss = System.err;
pss.println(new Date(100000));

try {
PrintStream ps1 = new PrintStream(new FileOutputStream("e.txt"));
ps1.print("aaaaaaaaaaaaa");
ps1.println("aaaaaaaaaaaaa");
ps1.println("aaaaaaaaaaaaa");
ps1.print("aaaaaaaaaaaaa");
ps1.print("aaaaaaaaaaaaa");
ps1.flush();//需要刷新

} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}
}