ActionListener java swing

Question

我一直在尝试使用swing广告创建一个窗口，我必须把按钮放在右边，这就是为什么我使用boxlayout，但我找不到一种方法来在我已经有的按钮上使用ActionListener。这就是我正在做的项目：

public class Fenetre2 extends JFrame {

private JSplitPane splitPan=null;

    public Fenetre2 (){
        JPanel pan = new JPanel ();

        // CARACTERISTIQUE FENETRE 
        this.setTitle("Gestion Employe");
        this.setSize(800, 400);
        this.setLocationRelativeTo(null);
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pan.setBackground(Color.white);
        this.setContentPane(pan);
        // ADD BUTTON  
        Container c = getContentPane();
        c.setLayout( new BorderLayout( 30, 30 ) );
        Box boxes[] = new Box[ 4 ];
        boxes[ 0 ] = Box.createHorizontalBox();
        boxes[ 1 ] = Box.createVerticalBox();
        boxes[ 2 ] = Box.createHorizontalBox();
        boxes[ 3 ] = Box.createVerticalBox();
        // create strut and add buttons to boxes[ 1 ]
        boxes[ 1 ].add( new JButton( "ajouter" ) );
        boxes[ 1 ].add( new JButton( "suprimer" ) );
        boxes[ 1 ].add( new JButton( "afficher" ) );
        c.add( boxes[ 1 ], BorderLayout.EAST );
        //TREE
        DefaultMutableTreeNode root = new DefaultMutableTreeNode("STRUCTURE EMPLOYE");
        //create the child nodes
        DefaultMutableTreeNode PDGNode = new DefaultMutableTreeNode("PDG");
        DefaultMutableTreeNode departement1Node = new DefaultMutableTreeNode("departement 1");
        departement1Node.add(new DefaultMutableTreeNode("CHEF DEPARTEMENT"));
        departement1Node.add(new DefaultMutableTreeNode("EMPLOYEE1"));
        departement1Node.add(new DefaultMutableTreeNode("EMPLOYEE2"));
        departement1Node.add(new DefaultMutableTreeNode("EMPLOYEE3"));


        //add the child nodes to the root node
        root.add(PDGNode);
        PDGNode.add(departement1Node);
        JTree tree = new JTree(root);
        this.add(tree);
        JScrollPane scroll=new JScrollPane(tree);
        splitPan=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,scroll,new JLabel("aaaaa"));
        splitPan.setSize(this.getMaximumSize());
        add(splitPan);

        this.setVisible(true);          
    }
    public static void main (String args []){

        Fenetre2 fen = new Fenetre2();
    }
}

Answer 1

您不应该直接将按钮添加到面板中，而应该实例化它们，然后向它们添加一个ActionListener或您想要对它们执行的任何其他操作。示例：

JButton ajouterButton = new JButton("ajouter");
ajouterButton.addActionListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent event) {
        // code goes here
    }
});

然后，您可以将按钮添加到数组中：

boxes[1].add(ajouterButton);

然后对你所有的按钮做同样的事情。

Answer 2

您要查找的按钮实例存储在boxes1中，因此您可以简单地执行boxes[1].addActionListener(...);。