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标题: 帮忙使这个计算器界面显示并可以运行 [打印本页]
作者: 姚伟涛    时间: 2012-4-18 01:24
标题: 帮忙使这个计算器界面显示并可以运行
  1. import java.awt.*;
  2. import java.awt.event.*;
  3. public class CalculatorFrame extends Frame implements ActionListener
  4. {
  5. private TextField text1,text2,text3;
  6. private Button button_1,button_2,button_3,button_4,button_5,button_plus,button_subtract,button_multiply,button_divide,button_cancel;
  7. private Label label1,label2,label3;
  8. public CalculatorFrame()
  9. {
  10. super("CalculatorFrame");

  12. this.setSize(320,120);
  13. this.setBackground(Color.lightGray);
  14. this.setLocation(300,240);
  15. this.setLayout(new FlowLayout(FlowLayout.LEFT));
  16. label1=new Label("shu1:");
  17. add(label1);
  18. text1 = new TextField(20);
  19. text1.addActionListener(this);
  20. this.add(text1);
  21. label1=new Label("shu2:");
  22. add(label2);
  23. text2 = new TextField(20);
  24. text2.addActionListener(this);
  25. this.add(text2);
  26. label3=new Label("=");
  27. add(label3);
  28. text3 = new TextField(20);
  29. text3.addActionListener(this);
  30. this.add(text3);
  31. button_1 = new Button("1");
  32. button_2 = new Button("2");
  33. button_3 = new Button("3");
  34. button_4 = new Button("4");
  35. button_5 = new Button("5");
  36. button_plus = new Button("+");
  37. button_subtract=new Button("-");
  38. button_multiply=new Button("*");
  39. button_divide=new Button("/");
  40. button_cancel = new Button("C");
  41. this.add(button_1);
  42. this.add(button_2);
  43. this.add(button_3);
  44. this.add(button_4);
  45. this.add(button_5);
  46. this.add(button_plus);
  47. this.add(button_subtract);
  48. this.add(button_multiply);
  49. this.add(button_divide);
  50. this.add(button_cancel);
  51. button_1.addActionListener(this);
  52. button_2.addActionListener(this);
  53. button_3.addActionListener(this);
  54. button_4.addActionListener(this);
  55. button_5.addActionListener(this);
  56. button_plus.addActionListener(this);
  57. button_subtract.addActionListener(this);
  58. button_multiply.addActionListener(this);
  59. button_divide.addActionListener(this);
  60. button_cancel.addActionListener(this);
  61. this.setVisible(true);

  63. this.addWindowListener(new WinClose());

  65. }
  66. public void actionPerformed(ActionEvent e)
  67. { if (e.getSource()==button_plus)
  68. {text3.setText(Float.valueOf(Float.valueOf(text1.getText())+Float.valueOf(text2.getText())).toString());}
  69. if (e.getSource()==button_subtract)
  70. {text3.setText(Float.valueOf(Float.valueOf(text1.getText())-Float.valueOf(text2.getText())).toString()); }
  71. if (e.getSource()==button_multiply)
  72. {text3.setText(Float.valueOf(Float.valueOf(text1.getText())*Float.valueOf(text2.getText())).toString());}
  73. if (e.getSource()==button_divide)
  74. {text3.setText(Float.valueOf(Float.valueOf(text1.getText())/Float.valueOf(text2.getText())).toString());}
  75. else
  76. {text1.setText("");
  77. text2.setText("");
  78. text3.setText("");}
  79. }
  80. public static void main(String arg[])
  81. {
  82. new CalculatorFrame();
  83. }
  84. }

  86. class WinClose implements WindowListener
  87. {
  88. public void windowClosing(WindowEvent e)
  89. {
  90. System.exit(0);
  91. }
  92. public void windowOpened(WindowEvent e) { }
  93. public void windowActivated(WindowEvent e) { }
  94. public void windowDeactivated(WindowEvent e) { }
  95. public void windowClosed(WindowEvent e) { }
  96. public void windowIconified(WindowEvent e) { }
  97. public void windowDeiconified(WindowEvent e) { }
  98. }
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