Java GUI实验报告

精选文库一、实验目的及要求二、实验原理与内容三、实验软硬件环境Windows 7旗舰版电脑一台JAVA运行编译环境Eclipse软件四、实验过程（实验步骤、记录、数据、分析）package tuxing;import java.awt.*;import java.awt.event.*;import javax.swing.*;public class TestCount extends JFrame implements ActionListenerstatic JTextField jtf1 = new JTextField(第一个数, 5);static JTextField jtf2 = new JTextField(第二个数, 5);static JTextField first = new JTextField(, 20);static JTextField second = new JTextField(, 20);static JTextField jtf5 = new JTextField(=, 2);static JTextField result = new JTextField(, 20);static JButton calculator=new JButton(计算);static JButton clear=new JButton(清除);static JButton out=new JButton(退出);static TestCount jfrm = new TestCount();static JPanel pan2 = new JPanel();static JComboBox jco;SuppressWarnings( rawtypes, unchecked )public static void main(String args) / TODO 自动生成的方法存根String str = +, -, *, /;jco = new JComboBox(str);/创建一个下拉菜单的控件 /显示下拉菜单pan2.add(jco);pan2.setBounds(285, 15, 55, 40);jfrm.add(pan2);jfrm.setLayout(null);jfrm.setSize(800, 250);jfrm.setTitle(简易计算器);jtf1.setBounds(100,20,55,25);jtf1.setEditable(false);jfrm.add(jtf1);/第一个文本框first.setBounds(170,20,100,25);first.setEditable(true);jfrm.add(first);jtf2.setBounds(350,20,55,25);jtf2.setEditable(false);jfrm.add(jtf2);/第二个文本框second.setBounds(420,20,100,25);second.setEditable(true);jfrm.add(second);jtf5.setBounds(540,20,15,25);jtf5.setEditable(false);jfrm.add(jtf5);/第三个文本框result.setBounds(580,20,100,25);result.setEditable(true);jfrm.add(result);/添加三个按钮calculator.setBounds(450,100,60,28);/距离窗体的长，高，本身的长、高clear.setBounds(530,100,60,28);out.setBounds(610,100,60,28); jfrm.add(calculator); jfrm.add(clear); jfrm.add(out); calculator.addActionListener(jfrm); /把事件监听者jfrm向jbt1注册 clear.addActionListener(jfrm); /把事件监听者jfrm向jbt2注册 out.addActionListener(jfrm); /把事件监听者jfrm向jbt3注册jfrm.setVisible(true);jfrm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);Overridepublic void actionPerformed(ActionEvent e) / TODO 自动生成的方法存根if(e.getSource() = out)System.exit(0);else if(e.getSource() = clear)double firstnum1 =0.0 ;double secondnum1 =0.0;first.setText(String.valueOf(firstnum1);second.setText(String.valueOf(secondnum1);else int i = jco.getSelectedIndex();/ 得到当前下拉列表框的值 String str1 = first.getText();/ 得到第一个文本框的值 String str2 = second.getText();/ 得到第二个文本框的值 if (str1 != null & str2 != null) double numOne = Double.parseDouble(str1); double numTwo = Double.parseDouble(str2); double sum = 0; if (i = 0) sum = numOne + numTwo; if (i = 1) sum = numOne - numTwo; if (i = 2) sum = numOne * numTwo; if (i = 3) sum = numOne / numTwo; result.setText(String.valueOf(sum);/ 将结果显示在第三个文本框中五、测试/调试及实验结果分析六、实验结论与体会学会