testprintstream.java

本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书

package apibook.c3.s10;

import java.io.*;
import java.util.*;

//测试PrintStream类
public class TestPrintStream {
  public TestPrintStream() {
  }
  public static void main(String[] args) {
    String str = "abc";
    char[] chs = new char[str.length()];
    str.getChars(0, str.length(), chs, 0);

    System.out.print(new Date());          // 输出对象
    System.out.println(new Date());        // date

    System.out.print(str);                 // String
    System.out.println(str);
    System.out.print(chs);                 // char[]
    System.out.println(chs);
    System.out.print(' ');                 // char
    System.out.println(' ');
    System.out.print(5);                   // int
    System.out.println(5);
    System.out.print(5L);                  // long
    System.out.println(5L);
    System.out.print(1.23f);               // float
    System.out.println(1.23f);
    System.out.print(1.23);                // double
    System.out.println(1.23);
    System.out.print(true);                // boolean
    System.out.println(true);

    if (System.out.checkError()) {
        System.err.println("Got errors printing");
        System.exit(-1);
    }

    System.out.write('A');
    byte[] b = str.getBytes();
    System.out.write(b, 0, b.length);
    System.out.flush();
    System.out.close();
  }

}