我只是這個鞦韆的新生,所以我遇到了這個問題: 我試圖把圖像放到我的按鈕,但每當我嘗試加,是因爲在其他條目返回此 Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:217)
at gui.MainPanel.<in
import java.awt.*;
import javax.swing.*;
public class Program {
public static JButton button;
public static void main(String args[]){
JFrame win=new JFrame("title");
win.setVisible(true