[英]How do i display in JTextarea or JTable
因此,我创建了两个按钮,并且在单击按钮时想执行特定的任务。 如果使用ActionListener单击按钮1(b1),我想创建Van对象,并在JTextarea或JTable中显示实例变量。 例如,如果单击Van按钮,则操作将是创建Van对象并获取实例变量值,并将其打印在JTextArea / JTable中。 下面是我到目前为止的代码:
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTable;
public class TestButton extends JFrame{
JTable table;
public TestButton (){
setLayout(new FlowLayout());
}
static class ActionTwo implements ActionListener{
@Override
public void actionPerformed (ActionEvent evt){
Vehicle sport = new Sportcar (200, 1500, 220);
}
}
static class Action implements ActionListener{
@Override
public void actionPerformed (ActionEvent evt){
Vehicle aVan = new Van(100,0.9,3500,160.4);
}
}
public static void main (String [] args){
JFrame frame = new JFrame ("Type of Vehicle");
frame.setVisible(true);
frame.setSize(400,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
JPanel panel = new JPanel();
panel.setBackground(Color.black);
JButton b1 = new JButton("Van");
JButton b2 = new JButton("Sports Car");
panel.add(b1);
panel.add(b2);
frame.add(panel);
b1.addActionListener(new Action());
b2.addActionListener(new ActionTwo());
}
}
这将完成您想做的事情,但是您应该通读该教程以全面了解正在发生的事情。
public static void main (String [] args){
JTextField text = new JTextField();
ActionListener textSetter = new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
JButton clicked = (JButton) e.getSource();
text.setText(clicked.getText());
}
};
JButton btnVan = new JButton("Van");
btnVan.addActionListener(textSetter);
JButton btnCar = new JButton("Sports Car");
btnCar.addActionListener(textSetter);
JPanel btnPanel = new JPanel();
btnPanel.add(btnVan);
btnPanel.add(btnCar);
JPanel mainPanel = new JPanel(new BorderLayout());
mainPanel.add(text, BorderLayout.NORTH);
mainPanel.add(btnPanel, BorderLayout.SOUTH);
JFrame frame = new JFrame ("Type of Vehicle");
frame.add(mainPanel);
frame.setSize(400,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
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