86.

87. this.setLayout(new FlowLayout());

88. this.add(context);

89.

90. initWindow();

91.

92. this.setVisible(true);

93. }

94.

95. /**

96. * 初始化窗体

97. */

98. private void initWindow(){

99. context.setLayout(new BorderLayout(10,10)); 100.

101. // 显示面板

102. displayPanel.setLayout(new FlowLayout(FlowLayout.CENTER));

103. displayPanel.add(result);

104. result.setHorizontalAlignment(JTextField.RIGHT);

105. result.setFocusable(false);

106. context.add(displayPanel,"North"); 107.

108. // 数字面板

109. numPanel.setLayout(new GridLayout(4,3,5,5));

110. for(int i=1;i<=9;i++){

111. numPanel.add(getNumberButton(i)); 112. }

113. numPanel.add(btnCE);

114. btnCE.addKeyListener(keyListener); 115. numPanel.add(getNumberButton(0)); 116.

117. btnCE.addActionListener(new ActionListener(){

118.

119. public void

actionPerformed(ActionEvent e) {

120. inputing = plus = minus = false;

121. result.setText("0");

122. result.setHorizontalAlignment(JTextField.RIGHT);