java - JComboBox 数组的事件并在 JLabel 数组中显示信息

Question

我有像这样的 JComboBox 数组和 JLabel 数组 当我选择每个 JComboBo 中的值时，我将在这里做什么以使 JLabel 返回相应的值例如，comboBox[0].setSelectItem(4); label[0] 将得到文本为 4当comboBox[4].setSelectedItem(2); label[4] 将得到文本为 2

import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JComboBox;
import javax.swing.JLabel;

public class Example extends javax.swing.JFrame implements ItemListener {
    JComboBox[] comboBox = new JComboBox[5];
    JLabel[] label = new JLabel[5];

    public void test() {
        for (int i = 0; i < label.length; i++) {
            comboBox[i] = new JComboBox();
            label[i] = new JLabel();
            add(comboBox[i]);
            add(label[i]);
            for (int j = 0; j <= 10; j++) {
                comboBox[i].addItem(j);
            }
            comboBox[i].addItemListener(this);

        }
    }

    @Override
    public void itemStateChanged(ItemEvent e) {
        // What i will do here to make the JLabel return corresponding when I
        // select the values in each JComboBox

        /*
         * Example when comboBox[0].setSelectItem(4); the label[0] will get the
         * text is 4 when the comboBox[4].setSelectedItem(2); the lable[4] will
         * get the text is 2
         */
    }
}

请任何人帮助我:(

Answer 1

JComboBox 有方法

public int getSelectedIndex()

用它来获取索引，将索引转换为字符串并设置到JLabel。