?? addtwoapplet.java
字號:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class AddTwoApplet extends JApplet implements ActionListener {
JTextField one = new JTextField("0", 5);
JLabel plus = new JLabel("+");
JTextField two = new JTextField("0", 5);
JButton equals = new JButton("Add");
JLabel result = new JLabel("???");
public void init() {
Container pane = getContentPane();
FlowLayout flow = new FlowLayout();
pane.setLayout(flow);
equals.addActionListener(this);
pane.add(one);
pane.add(plus);
pane.add(two);
pane.add(equals);
pane.add(result);
setContentPane(pane);
}
public void actionPerformed(ActionEvent evt) {
try {
int value1 = Integer.parseInt(one.getText());
int value2 = Integer.parseInt(two.getText());
result.setText("" + (value1 + value2));
} catch (NumberFormatException exc) {
one.setText("0");
two.setText("0");
result.setText("0");
}
}
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -