Java ArrayLists转换为JList

Z时代
2024-01-10
分类：问答

好，所以我只占了库存的一小部分。我记不清了。我试图将字符串项添加到ArrayList，然后将其添加到JList。但是，在编译时出现此错误：

C:\Users\Dan\Documents\DanJavaGen\inventory.java:30: cannot find symbol
symbol  : constructor JList(java.util.ArrayList<java.lang.String>)
location: class javax.swing.JList
        list = new JList(arr);

我可能正在犯一些菜鸟错误…：/

码：

import java.applet.Applet;
import java.awt.*;
import javax.swing.*;
import javax.swing.JList;
import java.awt.event.*;
import java.util.ArrayList;
import java.io.*;
import java.util.*;
public class inventory extends JApplet implements MouseListener {
public static String newline;
public static JList list;
int gold = 123;
    public void init() {
ArrayList<String> arr = new ArrayList<String>();
arr.add("Hatchet");
arr.add("Sword");
arr.add("Shield");
arr.add(gold + " Gold");
System.out.println("You have " + arr.size() + " items in your inventory.");
showInventory(arr);
        list = new JList(arr);
        add(list);
        list.addMouseListener(this);
        list.setVisible(true);
    }
public static void showInventory (ArrayList<String> theList) {
for (int i = 0; i < theList.size(); i++) {
System.out.println(theList.get(i));
}
}
    public void mousePressed(MouseEvent e) { }
    public void mouseReleased(MouseEvent e) {
        Object index = list.getSelectedValue();
       System.out.println("You have selected: " + index);
    }
    public void mouseEntered(MouseEvent e) { }
    public void mouseExited(MouseEvent e) { }
    public void mouseClicked(MouseEvent e) { }
    public void paint(Graphics g) {
    }
}