摘要:
1、外部类监听package com.yfs.javase;import java.awt.Button;import java.awt.FlowLayout;import java.awt.Frame;import java.awt.TextField;import java.awt.event.... 阅读全文
摘要:
0.Calculaterpackage com.yfs.javase;import java.awt.BorderLayout;import java.awt.Button;import java.awt.Frame;import java.awt.GridLayout;import java.aw... 阅读全文
摘要:
1.系统时间package com.yfs.javase;import java.sql.Time;import java.sql.Timestamp;import java.util.Calendar;import java.util.Date;public class DateDemo1 { /... 阅读全文
摘要:
1.Mathpackage com.yfs.javase;public class MathDemo { public static void main(String[] args) { int r = 2; System.out.println("圆的面积 : " + (Math.PI * r... 阅读全文