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Java Swing - 如何禁用JFrame最小化按钮

jframe 【jframe】
我们想知道如何禁用JFrame最小化按钮。
代码展示 运行结果 
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class Main {
  public Main() {
    frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
    frame.setResizable(false);
    frame.addWindowListener(getWindowAdapter());

    frame.pack();
    frame.setVisible(true);
  }

  public static void main(String[] args) {
    Main test = new Main();
  }

  private final JFrame frame = new JFrame();

  private WindowAdapter getWindowAdapter() {
    return new WindowAdapter() {
      @Override
      public void windowClosing(WindowEvent we) {
        super.windowClosing(we);
        JOptionPane.showMessageDialog(frame, "Cant Exit");
      }
      @Override
      public void windowIconified(WindowEvent we) {
        frame.setState(JFrame.NORMAL);
        JOptionPane.showMessageDialog(frame, "Cant Minimize");
      }
    };
  }
}