java - GridBagLayout 被标记为错误

Question

import javax.swing.JFrame;
import javax.swing.SwingUtilities;
>>>import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import javax.swing.JButton;
import javax.swing.BorderFactory;
public class GridBagLayout {
    public static void createWindow(){
        JFrame aWin = new JFrame("Title");
        aWin.setBounds(0,0,200,200);
        aWin.setVisible(true);

        GridBagLayout gridBag = new GridBagLayout();
        GridBagConstraints constraints = new GridBagConstraints();
        >>>aWin.getContentPane().setLayout(gridBag);


        constraints.weightx = constraints.weighty = 10.0;
        constraints.fill = GridBagConstraints.BOTH;
        addButton(" Press ",constraints,gridBag,aWin);
        constraints.gridwidth=GridBagConstraints.REMAINDER;
    }
    static void addButton(String label,GridBagConstraints constraints,GridBagLayout layout,JFrame window){
        JButton button = new JButton(label);
        button.setBorder(BorderFactory.createEtchedBorder());
        >>>layout.setConstraints(button,constraints);
        window.getContentPane().add(button);
    }
    public static void main(String[] args){
        SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                createWindow();
            }
        });
    }
}

标有 >>> 的行被 Eclipse IDE 标记为错误。
import java.awt.GridBagLayout; 的错误表明同一文件中的类型可能存在冲突
aWin.getContentPane().setLayout(gridBag); 的错误指出无法应用 GridBagLayout，尽管当我尝试 FlowLayout 时，一切都很好。
layout.setConstraints(button,constraints); 的错误表明该方法未定义。
出现这个错误的原因是什么？请帮我解决一下。

Answer 1

编译错误几乎描述了问题。只需将您的类重命名为 GridBagLayoutTest。