java - 设置JLabel以显示图像的正确方法是什么？

下面是创建我的ImageIcon和JLabel的代码片段：

ImageIcon armorShopIcon = new ImageIcon("/images/armorshop.png", "Armor Shop");
JLabel armorShopLabel = new JLabel("Armor Shop", armorShopIcon, JLabel.CENTER);

object.setArmorImage(armorShopLabel);

然后在我的对象类中，有一个setter：

public void setArmorImage(JLabel label) {
    this.jLabel1 = label;
}

当我测试我的应用程序时，这没有显示图像，我想知道是否有人可以指出我的错误

编辑

大多数源代码：

主要：

public class Main extends javax.swing.JFrame {

    public Main() {

    initComponents();

    ImageIcon armorIcon = new ImageIcon("/images/armorshop.png", "Armor Shop");
    JLabel armorShopLabel = new JLabel("Armor Shop", armorShopIcon, JLabel.CENTER);

    ShopDisplay armorShop = new ShopDisplay();
    armorShop.setArmorImage(armorShopLabel);


        public initComponents() { /*more generated code here*/ }

    }
}

显示：

public class ShopDisplay extends javax.swing.JPanel {

    /** Creates new form ShopDisplay */
    public ShopDisplay() {
        initComponents();
    }


    //generated by the gui builder
    //initComponents
    private void initComponents() {
    jLabel1 = new javax.swing.JLabel();
    jLabel1.setText("Shop Name");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        add(jLabel1, gridBagConstraints);
    }

    //Variable declarationg
    private javax.swing.JLabel jLabel1;


    //Setter for Shop Name
    public void setArmorImage(JLabel shopLabel) {
        this.jLabel1 = shopLabel;
    }

    //other setters for
    //multiple jLabels

}

最佳答案

您传递的标签未添加到GUI，以下方法可能会帮助您-

添加另一个JPanel作为jLabel1的容器，仅替换其内容：

即：

    private javax.swing.JPanel containerPanel;
    private void initComponents() {
        jLabel1 = new javax.swing.JLabel();
        jLabel1.setText("Shop Name");
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.fill = java.awt.GridBagConstraints.BOTH;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.weighty = 1.0;
        containerPanel = new javax.swing.JPanel();
        containerPanel.add(jLabel1);
        add(containerPanel, gridBagConstraints);
    }

    //Variable declarationg
    private javax.swing.JLabel jLabel1;


    //Setter for Shop Name
    public void setArmorImage(JLabel shopLabel) {
        containerPanel.remove(jLabel1);
        containerPanel.add(shopLabel);
        jLabel1 = shopLabel;
        revalidate();
    }

，如果要将其添加到gui中，可以执行以下操作之一：


将jLabel1的属性设置为shopLabel的属性，例如this.jLabel1.setText(shopLabel.getText());
或-删除jLabel1，添加shopLabel并将this.jLabel1设置为shopLabel：


例如：

public void setArmorImage(JLabel shopLabel) {
    remove(jLabel1);
    add(shopLabel);
    jLabel1 = shopLabel;
    revalidate();
}