java中swing的imageicon插入图片时爆空指针

import javax.swing.*;
import java.awt.*;
import java.net.URL;

import static java.lang.Math.abs;

public class Main {
    public static void main(String[] args) {
      myFrame x=new myFrame(50,50,600,600,Color.WHITE,"登录");
    }
}
class myFrame extends JFrame {
    myFrame (int x,int y,int w,int h,Color color,String s)
    {
        setTitle(s);
        setBounds(x,y,w,h);
        setBackground(color);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        JLabel label =new JLabel("Imageicon");
        label.setIcon(new ImageIcon(ImageIcon.class.getResource("RC.jpg")));
        getContentPane().add(label);


    }
}

是这个为空？

• 建议你看下这篇博客👉 ：Java中swing使用ImageIcon类添加图片
• 除此之外, 这篇博客: JavaSE：GUI编程入门到游戏实战中的 3. Icon、ImageIcon标签 部分也许能够解决你的问题, 你可以仔细阅读以下内容或跳转源博客中阅读:
  

• 图标标签

  package com.demo8_gui.demo04_swing;
  
  import javax.swing.*;
  import java.awt.*;
  
  //图标，需要实现类，Frame继承
  public class IconDemo extends JFrame implements Icon {
  
      private int width;
      private int height;
  
      public IconDemo(){}//无参构造
  
      public IconDemo(int width,int height){
          this.width = width;
          this.height = height;
      }
  
      public void init(){
          IconDemo iconDemo = new IconDemo(15, 15);
          //图标放在标签上，也可以放在按钮上！
          JLabel label = new JLabel("icontest",iconDemo,SwingConstants.CENTER);
  
          Container container = getContentPane();
          container.add(label);
  
          this.setVisible(true);
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
      }
  
      public static void main(String[] args) {
          new IconDemo().init();
      }
  
      @Override
      public void paintIcon(Component c, Graphics g, int x, int y) {
          //组件 Component，画笔 Graphics
          g.fillOval(x,y,width,height);
      }
  
      @Override
      public int getIconWidth() {
          return this.width;
      }
  
      @Override
      public int getIconHeight() {
          return this.height;
      }
  }
  
  

  图片标签

  package com.demo8_gui.demo04_swing;
  
  import javax.swing.*;
  import java.awt.*;
  import java.net.URL;
  
  public class ImageIconDemo extends JFrame {
  
      public ImageIconDemo(){
          //获取图片的地址
          JLabel label = new JLabel("ImagIcon");
          URL url = ImageIconDemo.class.getResource("1.jpg");//放的是绝对路径下的资源（不同电脑，设置可能不一样）
  
          ImageIcon imageIcon = new ImageIcon(url);//命名不要冲突了！原来的类名为ImageIcon，产生冲突了报错
          label.setIcon(imageIcon);
          label.setHorizontalAlignment(SwingConstants.CENTER);
  
          Container container = getContentPane();
          container.add(label);
  
          setVisible(true);
          setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          setBounds(100,100,200,200);
      }
  
      public static void main(String[] args) {
          new ImageIconDemo();
      }
  }