Question

我正在尝试制作一个带有图像和2个按钮（即放大和缩小）的程序，该按钮将放大和缩小图像。我正在尝试使用JLabel添加图像，但无法这样做。我尝试使用ImageIcon创建图标，并在JLabel方法setIcon（）中使用它，但图像未显示。我还提到了StackOverflow上的一些代码，但是它们都不适合我。

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

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

public class Car extends JFrame
{
    JButton zoomIn, zoomOut;
    JLabel img; 
    String url = "C:\\Users\\Misomaniac\\eclipse-workspace\\Chegg\\Desert.jpeg";            // url of image


    public Car() {
        super("Car");                    // title bar text
        setLayout(null);

        zoomIn = new JButton("Zoom in");
        zoomIn.setBounds(150, 250, 100, 30);        // location in Frame
        add(zoomIn);

        zoomOut = new JButton("Zoom out");
        zoomOut.setBounds(280,250,100,30);          // location in Frame
        add(zoomOut);

        img = new JLabel();     
        ImageIcon icon = new ImageIcon(url); 

        img.setIcon(icon);  
        img.setBounds(200, 50, 300, 200);           // location in Frame
        add(img);

        zoomIn.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    // image will zoom in when this button is clicked
                }
        });

        setVisible(true);  
        setSize(550,400);       // size of window
        setLocation(100,150);   // location of window on monitor
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }


    public static void main(String[] args)
    {
        new Car();
    }
}

将图像添加到JLabel

0 个答案: