Java.io.PrintStream.flush() 方法 Java.io.PrintStream.close() 方法 Java.io.PrintStream.format() 方法 Java.io.PrintStream.flush() 方法 package com.codingdict; import java.io.*; public class PrintStreamDemo { public static void main(String[] args) { String s = "Hello World."; // create printstream object PrintStream ps = new PrintStream(System.out); // print our string ps.print(s); // flush the stream to see the results ps.flush(); // print new string ps.println(); ps.print("This is an example"); // flush to see new string ps.flush(); } } Java.io.PrintStream.close() 方法 Java.io.PrintStream.format() 方法