Java.io.PrintWriter.print Object() 方法 Java.io.PrintWriter.print long() 方法 Java.io.PrintWriter.print String() 方法 Java.io.PrintWriter.print Object() 方法 package com.codingdict; import java.io.*; import java.util.Date; public class PrintWriterDemo { public static void main(String[] args) { Object obj1 = "Object"; Object obj2 = 2; Date date = new Date(112, 2, 21); try { // create a new writer PrintWriter pw = new PrintWriter(System.out); // print object pw.print(obj1); // change the line pw.println(); // print another object pw.print(obj2); // change the line pw.println(); // print a date (it is an object) pw.print(date); // flush the writer pw.flush(); } catch (Exception ex) { ex.printStackTrace(); } } } Java.io.PrintWriter.print long() 方法 Java.io.PrintWriter.print String() 方法