Question

我对我的节目感到困惑。如果单击某个列表，如何在我的串联中获取整数数组？这是我正在尝试的代码。

import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import java.awt.*;

public class JListDemo extends JFrame {
    JList list;
    String[] listColorNames = {"tres", "dos", "piso", "kwatro", "sais"};
    int[] listColorValues = {3, 2, 1, 4, 6};
    Container con;

    public JListDemo() {
        super("List Source Demo");
        con = getContentPane();
        con.setLayout(new FlowLayout());
        list = new JList(listColorNames);
        list.setSelectedIndex(0);
        list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
        con.add(new JScrollPane(list));
        list.addListSelectionListener(new ListSelectionListener() {
            public void valueChanged(ListSelectionEvent e) {

                con. (listColorValues[list.getSelectedIndex()]);
            }
        }
        );
        setSize(200, 200);
        setVisible(true);
        //setSizable(false);
    }

    public static void main(String[] args) {
        JListDemo test = new JListDemo();
        test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

Answer 1

如果我明白你想做什么：

list.addListSelectionListener(new ListSelectionListener() {
        public void valueChanged(ListSelectionEvent e) {

            JLabel price = new JLabel(listColorValues[list
                    .getSelectedIndex()] + "");

            con.add(price);
            con.revalidate();
        }
    });

但是，如果您希望文本显示在列表下方，则flowLayout不适合您的需要。

Answer 2

如果它们相关，则不要制作两个不同的组件，而是将它们封装在如下的类中：

public class ColorVal {
    private String colorValue;
    private int colorIndex;

public String getColorValue() {
    return colorValue;
}

public void setColorValue(String colorValue) {
    this.colorValue = colorValue;
}

public int getColorIndex() {
    return colorIndex;
}

public void setColorIndex(int colorIndex) {
    this.colorIndex = colorIndex;
}

}

你可以这样做：

 public class JavaApplication2 extends JFrame {

JList list;
String[] listColorNames = new String[10];
List<ColorVal> colorValList = new ArrayList<ColorVal>();
ColorVal colorVal = new ColorVal();
Container con;

public JavaApplication2() {
    super("List Source Demo");

    colorVal = new ColorVal();
    colorVal.setColorIndex(2);
    colorVal.setColorValue("dos");
    colorValList.add(colorVal);

    colorVal = new ColorVal();
    colorVal.setColorIndex(1);
    colorVal.setColorValue("piso");
    colorValList.add(colorVal);


    //add your other colors
    con = getContentPane();
    con.setLayout(new FlowLayout());

    for (int i = 0; i < colorValList.size(); i++) {
        listColorNames[i] = colorValList.get(i).getColorValue();
    }

    list = new JList(listColorNames);

    list.setSelectedIndex(0);
    list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    con.add(new JScrollPane(list));
    list.addListSelectionListener(new ListSelectionListener() {
        public void valueChanged(ListSelectionEvent e) {
            System.out.println(colorValList.get(list.getSelectedIndex()).getColorIndex()); //do what you want
        }
    });
    setSize(200, 200);
    setVisible(true);
    //setSizable(false);
}

public static void main(String[] args) {

    JavaApplication2 test = new JavaApplication2();
    test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

}

使用java对象和类。

Int数组无法调用

2 个答案: