Java 程式用於建立指向北方的箭頭按鈕

要建立指向北方的箭頭按鈕，請使用 BasicArrowButton

BasicArrowButton arrow = new BasicArrowButton(BasicArrowButton.NORTH);

在上面，我們將箭頭設定為 NORTH。現在將它新增到 Panel

panel.add(arrow, BorderLayout.NORTH);

以下是建立指向北方的箭頭按鈕的示例

示例

import java.awt.BorderLayout;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.plaf.basic.BasicArrowButton;
public class SwingDemo extends JPanel {
   public SwingDemo() {
      setLayout(new BorderLayout());
      JPanel panel = new JPanel(new BorderLayout());
      add(panel, BorderLayout.EAST);
      BasicArrowButton arrow = new BasicArrowButton(BasicArrowButton.NORTH);
      panel.add(arrow, BorderLayout.NORTH);
   }
   public static void main(String[] args) {
      JFrame frame = new JFrame("Frame with arrow");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.add(new SwingDemo());
      frame.setSize(600, 500);
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }
}

結果如下，顯示指向 NORTH 的箭頭按鈕