Java 如何使用JButtons为ActionEvent创建If语句

如何仅使属于用户按下的按钮的文本显示出来。到目前为止，此代码将打开所有显示其他按钮文本的窗口。我正在考虑使用IF语句，但我不确定单击按钮时要输入什么。如果有人知道如何为单击的按钮生成IF语句，请共享信息

头等舱

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BoxLayout;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

@SuppressWarnings("serial")
public class rohwcg extends JFrame
{

// adds the buttons
private JButton minerbutton;
private JButton farmerbutton;
private JButton lumberjackbutton;
    private JButton blacksmithbutton;

public rohwcg()
{
    super ("Realms of Havenwood Class Guide");
    setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
    setBackground(Color.GREEN);

    //miner button
    Icon mbutton = new ImageIcon (getClass() .getResource("miner.png"));
    minerbutton = new JButton(mbutton);
    add(minerbutton);

    //farmer button
    Icon fbutton = new ImageIcon (getClass() .getResource("farmer.png"));
    farmerbutton = new JButton(fbutton);
    add(farmerbutton);

    //lumberjack button
    Icon lbutton = new ImageIcon (getClass() .getResource("lumberjack.png"));
    lumberjackbutton = new JButton(lbutton);
    add(lumberjackbutton);

    //blacksmith button
    Icon bbutton = new ImageIcon (getClass() .getResource("blacksmith.png"));
    blacksmithbutton = new JButton(bbutton);
    add(blacksmithbutton);

    //the action of the button.
    HandlerClass handler = new HandlerClass();
    minerbutton.addActionListener(handler);
    farmerbutton.addActionListener(handler);
    lumberjackbutton.addActionListener(handler);
    blacksmithbutton.addActionListener(handler);

    //sets the position of the button to center.
    blacksmithbutton.setAlignmentX(Component.CENTER_ALIGNMENT);
    minerbutton.setAlignmentX(Component.CENTER_ALIGNMENT);
    lumberjackbutton.setAlignmentX(Component.CENTER_ALIGNMENT);
    farmerbutton.setAlignmentX(Component.CENTER_ALIGNMENT);    
}

private class HandlerClass implements ActionListener
{
    //what happens when you click the button, below.
    public void actionPerformed(ActionEvent event)
    {           
        //farmer
        String farmertext = "null farmer";  
        JOptionPane.showMessageDialog(farmerbutton,farmertext,"The Farmer Class",JOptionPane.PLAIN_MESSAGE);

        //miner
        String minertext = "null miner";
        JOptionPane.showMessageDialog(minerbutton,minertext, "The Miner Class", JOptionPane.PLAIN_MESSAGE);

        //blacksmith
        String blacksmithtext ="null blacksmith";
        JOptionPane.showMessageDialog(blacksmithbutton,blacksmithtext, "The BlackSmith Class", JOptionPane.PLAIN_MESSAGE);

        //lumberjack
        String lumberjacktext = "null lumberjack";
        JOptionPane.showMessageDialog(lumberjackbutton, lumberjacktext, "The Lumberjack Class", JOptionPane.PLAIN_MESSAGE);         
    }

} 
}

二等舱

import java.awt.Dimension;
import java.awt.Toolkit;
import javax.swing.JFrame;

public class thehandler {
public static void main(String args []) 
{
    rohwcg classes1 = new rohwcg();
    classes1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    classes1.setSize(700,300);
    classes1.setVisible(true);

    //Sets the position of the window to a comman ratio. 
    Toolkit tk = Toolkit.getDefaultToolkit();
    Dimension d = tk.getScreenSize();
    int x = d.width / 2;
    int y = (d.height / 2 ) - classes1.getHeight();
    classes1.setLocation(x,y);
}

}

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没关系，我找到了答案！非常简单，只需添加一个对象并单击即可

private class HandlerClass implements ActionListener

{

}

---

}没关系，我找到了答案！非常简单，只需添加一个对象并单击即可

private class HandlerClass implements ActionListener

{

}

}