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我想知道是否有一種方法來添加一個JScrollPane到JList,其中該列表是在JPanel上。我到處尋找這方面的例子,但我找不到任何東西。滾動不出現。Java,添加JScrollPane列出一個JPanel
這裏是我的代碼:
import java.awt.Dimension;
import javax.swing.*;
import javax.swing.ListSelectionModel;
public class MyClass{
public static void main(String args[]){
//Declaring JFrame, JPanel, JList, JScrollPane objects
JFrame frame = new JFrame();
JPanel panel = new JPanel();
JList list;
JScrollPane scroll;
String[] numberTest = {"1", "2", "3", "4", "5", "6", "7", "8", "9", "10"};
//JFrame, frame
frame.setResizable(false);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(500, 500);
frame.setVisible(true);
//JPanel, panel
panel.setLayout(null);
frame.add(panel);
//JList, list
list = new JList(numberTest);
//list properties
list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
list.setLayoutOrientation(JList.VERTICAL);
list.setVisibleRowCount(3);
//Add JScrollPane to list [What I need help with, its not working]
JScrollPane listScroller = new JScrollPane(list);
listScroller.setPreferredSize(new Dimension(250, 80));
//Setbounds, add list and repaint frame
list.setBounds(25, 25, 100, 100);
panel.add(list);
frame.repaint();
}
}
將'listScroller'添加到'panel'而不是'list'。 –
'panel.setLayout(null);'是問題之一 – MadProgrammer