Question

设计一个程序,使用Textfield输入一个文本当点击一个按钮后将该文本添加到一个choice当中

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Answer 1

import java.awt.Button;
import java.awt.Choice;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;

public class TestData extends JFrame implements ActionListener
{

private TextField textField;
private Button button;
private Choice choice;

public TestData(){
textField = new TextField();
Dimension preferredSize = new Dimension(200, 20);
textField.setPreferredSize(preferredSize);
button = new Button("添加");
choice = new Choice();
this.setLayout(new FlowLayout(FlowLayout.CENTER, 1, 1));
this.add(textField);
this.add(button);
this.add(choice);
this.setBounds(100, 100, 300, 300);
this.setVisible(true);
button.addActionListener(this);
}

public static void main(String[] args)
{
// TODO Auto-generated method stub
TestData td = new TestData();

}

@Override
public void actionPerformed(ActionEvent e)
{
// TODO Auto-generated method stub
if(e.getSource() == button){
choice.add(textField.getText());
}
}

}
完整代码希望采纳