java - 如何创建分层 Pane

Question

我正在尝试为我的 java 游戏创建分层 Pane ，在我看到的几个示例中，已经使用了 getLayeredPane，但未导入。当我尝试执行相同的操作时，我收到“找不到符号”错误，我认为这通常意味着尚未导入某些内容。我在这里做错了什么？

package game.backbone;

import game.background.Background;
import game.character.DrawCha;
import game.character.MoveCha;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JComponent;
import javax.swing.JLayeredPane;

public class Window {
 private DrawCha cha;
 private MoveCha move;
 private JFrame frame;
 private Background bg;
 public static int SIZE;
 public static int w, h;

 public void createWindow(String title,int height) {
  bg = new Background();
  cha = new DrawCha();
  move = new MoveCha();
  frame = new JFrame();

  JLayeredPane lp = new getLayeredPane();

  h = height;
  w = height;

  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  frame.setSize(w, h);
  frame.setTitle(title);
  frame.setVisible(true);
  frame.setFocusable(true);

  frame.addKeyListener(move);

  lp.add(cha, new Integer(2));
  lp.add(bg, new Integer(1));
 }
}

Answer 1

语句 JLayeredPane lp = new getLayeredPane(); 不正确。您正在对方法调用 new。 修改JLayeredPane lp = new JLayeredPane();

public void createWindow(String title, int height) {
    bg = new Background();
    cha = new DrawCha();
    move = new MoveCha();
    frame = new JFrame();

    JLayeredPane lp = new JLayeredPane();

    h = height;
    w = height;

    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.addKeyListener(move);

    lp.add(cha, new Integer(2));
    lp.add(bg, new Integer(1));
    frame.add(lp);
    frame.setSize(w, h);
    frame.setTitle(title);
    frame.setVisible(true);
}

还要检查您的 DrawCha 和 Background 类是否扩展了 JInternalFrame。您可以有类似的东西

class DrawCha extends JInternalFrame {
 public DrawCha() {
      setBounds(50, 50, 100, 100);
      setResizable(true);
      setClosable(true);
      setMaximizable(true);
      setTitle("DrawCha");
      setVisible(true);
    }

}