实验九实验十

清疚 2021-12-19 03:53 294阅读 0赞

实验九

一.程序代码

package error;

public class Throwerror \{

public static void main(String\[\] args) throws IllegalArgumentException

\{ Point point1=new Point (3,1);

Point point2=new Point (6,2);

Point point3=new Point (9,3);

new Rectangle(point1, -12,3);

new Triangle(point1,point2,point3);

Point\[\] point= \{point1,point2\};

new Polygon(point);

class Point

\{ public Point() \{\};

public int x；

public int y;

public Point(int x,int y)

\{ this.x=x;

this.y=y；

if(x<0||y<0)

throw new IllegalArgumentException("Point中无效参数异常");

class Rectangle extends Point

public int length,width;

public Rectangle(Point point1,int length,int width) \{

this.length=length;

this.width=width;

if(length<0||width<0)

throw new IllegalArgumentException("Rectangle无效参数异常");

class Triangle extends Point

public Triangle(Point point1,Point point2,Point point3) \{

if(point1.x/point1.y==point2.x/point2.y&&point2.x/poin

实验十

一.程序代码

import java.awt.BorderLayout;

import java.awt.Container;

import java.awt.FlowLayout;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

public class Login \{

private JFrame frame = new JFrame("登录");

private Container c = frame.getContentPane();

private JTextField username = new JTextField();

private JPasswordField password = new JPasswordField();

private JButton ok = new JButton("确定");

private JButton cancel = new JButton("取消");

public Login()\{

frame.setSize(300,200);

c.setLayout(new BorderLayout());

initFrame();

frame.setVisible(true);

private void initFrame() \{

//顶部

JPanel titlePanel = new JPanel();

titlePanel.setLayout(new FlowLayout());

titlePanel.add(new JLabel("系统管理员登录"));

c.add(titlePanel,"North");

//中部表单

JPanel fieldPanel = new JPanel();

fieldPanel.setLayout(null);

JLabel l1 = new JLabel("用户名:");

l1.setBounds(50, 20, 50, 20);

JLabel l2 = new JLabel("密 码:"

l2.setBounds(50, 60, 50, 20);

fieldPanel.add(l1);

fieldPanel.add(l2);

username.setBounds(110,20,120,20);

password.setBounds(110,60,120,20);

fieldPanel.add(username);

fieldPanel.add(password);

c.add(fieldPanel,"Center");

//底部按钮

JPanel buttonPanel = new JPanel();

buttonPanel.setLayout(new FlowLayout());

buttonPanel.add(ok);

buttonPanel.add(cancel);

c.add(buttonPanel,"South");

public static void main(String\[\] args)\{

new Login();

二.实验心得

(1)掌握Java Swing组件的使用方法，理解委托事件处理模型;

(2)掌握多种布局方式;

(3)掌握窗口菜单和快捷菜单设计方式，熟悉在组件上绘图的方法;

(4)设计出具有图形用户界面的、能够响应事件的Java应用程序;

(5)掌握在MyEclipse集成开发环境中，通过设置编译路径引用其他项目中声明的类。

转载于:https://www.cnblogs.com/java199-cxm/p/10964002.html

实验九实验十

发表评论取消回复

还没有评论，来说两句吧...

相关阅读

相关 ArcGIS实验教程——实验二十九：ArcGIS制图掩膜工具案例详解

相关实验九：函数的使用

相关实验十链表

相关实验十一

相关实验九实验十

相关实验十二

相关第九次实验报告

相关实验十四

相关实验九

相关实验十四