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1、实验报告 4一、实验目的掌握 Swing 的使用，设计简单的 GUI 程序。二、实验环境1、微型计算机一台 2、WINDOWS 操作系统，Java SDK，Eclipse 开发环境三、实验内容 1、编写一个GUI界面的java程序。要求如下：1）主窗体首先显示以下内容：输入选手姓名和评委数后，点击确定，进入下一个界面2）第二个界面如下：按要求输入每位评委的评分后，点击提交，将按去掉一个最高分和一个最低分，取平均值，即为选手的成绩，进入下一个页面。点击重置，所有输入清零。3）第三个界面如下：显示该选手的成绩，点击按钮回到初始界面，进行下一个选手的评分。四、实验步骤和结果主函数代码：package
2、 windowsGUI;import javax.swing.JFrame;import javax.swing.JPanel;public class Main public static void main(String args) / TODO Auto-generated method stubfinal JFrame win=new JFrame(我的窗体);final JPanel panM=new JPanel();new firstWindows(win,panM);win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);win.s
3、etSize(500,300);win.setVisible(true);第一个界面代码：import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.JButton;public class firstWindows extends JPanel private
4、JTextField name=new JTextField(10); private JTextField cout=new JTextField(10); private JButton btn = new JButton(确定);final JPanel pan=new JPanel();public firstWindows(final JFrame win,final JPanel panM)win.getContentPane().remove(panM);JLabel lab1=new JLabel(输入选手姓名：);JLabel lab2=new JLabel(输入评委数：);
5、btn.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(e.getSource()=btn)final String name1=new String(name.getText();final int cout1=Integer.parseInt(cout.getText();new SecondWindows(win,name1,cout1,pan););pan.add(lab1);pan.add(name);pan.add(lab2);pan.add(cout);pan.
6、add(btn);win.add(pan);win.setVisible(true);运行结果及输入：第二个界面代码：import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class SecondWindows extends
7、JPanelprivate JTextField grade1=new JTextField(10); private JTextField grade2=new JTextField(10); private JTextField grade3=new JTextField(10); private JTextField grade4=new JTextField(10); private JButton btn1 = new JButton(提交);private JButton btn2 = new JButton(重置);final JPanel pan2=new JPanel();p
8、ublic SecondWindows(final JFrame win,final String name2,final int cout1,final JPanel pan)win.getContentPane().remove(pan);JLabel lab=new JLabel(正在为+name2+选手评分 );JLabel lab1=new JLabel(评委一：);JLabel lab2=new JLabel(评委二：);JLabel lab3=new JLabel(评委三：);JLabel lab4=new JLabel(评委四：);pan2.setLayout(null);la
9、b.setBounds(150, 10, 200, 20);lab1.setBounds(10, 50, 60,20);grade1.setBounds(80,50,80,20);lab2.setBounds(210, 50, 60, 20);grade2.setBounds(280,50,80,20);lab3.setBounds(10, 100, 60, 20);grade3.setBounds(80,100,80,20);lab4.setBounds(210, 100, 60, 20);grade4.setBounds(280,100,80,20);btn1.setBounds(90,2
10、00,80,30);btn2.setBounds(220,200,80,30);btn1.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(e.getSource()=btn1)double s=new doublecout1;scout1-4=Integer.parseInt(grade1.getText();scout1-3=Integer.parseInt(grade2.getText();scout1-2=Integer.parseInt(grade3.getText(
11、);scout1-1=Integer.parseInt(grade4.getText();java.util.Arrays.sort(s);double h=(scout1-3+scout1-2)/2;new TirdWindows(win,name2,h ,pan2););btn2.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(e.getSource()=btn2)grade1.setText();grade2.setText();grade3.setText();gra
12、de4.setText(););pan2.add(lab);pan2.add(lab1);pan2.add(grade1);pan2.add(lab2);pan2.add(grade2);pan2.add(lab3);pan2.add(grade3);pan2.add(lab4);pan2.add(grade4);pan2.add(btn1);pan2.add(btn2);win.add(pan2);win.setVisible(true);运行结果及输入：若点击 出现第三个界面代码：import java.awt.event.ActionEvent;import java.awt.event
13、.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class TirdWindows private JPanel pan3=new JPanel();private JButton btn = new JButton(回到初始画板);public TirdWindows(final JFrame win,String name3 ,double h,final JPanel pan2)wi
14、n.getContentPane().remove(pan2);JLabel lab=new JLabel(选手+name3+最终得分为： +h);pan3.setLayout(null);lab.setBounds(80, 10, 200, 20);btn.setBounds(300,10,120,20);pan3.add(lab); pan3.add(btn); btn.addActionListener(new ActionListener()public void actionPerformed(ActionEvent e) if(e.getSource()=btn)new first
15、Windows(win,pan3););win.add(pan3); win.setVisible(true);运行结果：点击 出现五、实验总结(1)为完成本次实验，历尽千辛万苦。1、实验在主函数创建一个窗体，使用匿名类创建一个面板，再把此面板添加到窗体中。2、去除原面板，在创建一个面板，把新面板添加到窗体中。3、以此类推，最后做回到初始画板操作时，添加第一个面板。4、完成本次实验。(2)传递原面板与窗体时，使用类的构造函数，如：new SecondWindows(win,name1,cout1,pan);public SecondWindows(final JFrame win,final String name2,final int cout1,final JPanel pan)(3)本实验使用绝对定位设置组件大小与位置。
