向ScrollPane添加多個JLabel

我試圖讓這個代碼垂直堆疊每個JLabel一個新消息（當添加消息被調用時）。這樣你就可以通過滾動查看每條消息。我對此很陌生，所以有什麼想法？現在，代碼只是用新消息替換textLabel。向ScrollPane添加多個JLabel

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.FlowLayout; 

import javax.swing.JButton; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.SwingConstants; 
import javax.swing.JScrollPane; 
import javax.swing.border.LineBorder; 
import javax.swing.BoxLayout; 

public class ChatWindow { 
static JFrame frame; 
static JScrollPane jScrollPane; 

public ChatWindow() { 

    frame = new JFrame("Ring Chat"); 
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

    JLabel label = new JLabel("Label"); 
    label.setPreferredSize(new Dimension(100, 100)); 
    jScrollPane = new JScrollPane(label); 


    JLabel textLabel = new JLabel("Welcome to Ring Chat!", SwingConstants.CENTER); 
    textLabel.setPreferredSize(new Dimension(300, 100)); 

    jScrollPane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); 
    jScrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
    jScrollPane.getViewport().add(textLabel); 

    frame.add(jScrollPane, BorderLayout.CENTER); 
    frame.setSize(400, 800); 
    frame.setVisible(true); 

} 

public static void addMessage(String msg) { 
    JLabel textLabel = new JLabel(msg, SwingConstants.CENTER); 
    textLabel.setPreferredSize(new Dimension(300, 100)); 
    jScrollPane.getViewport().add(textLabel, null); 
    frame.add(jScrollPane, BorderLayout.CENTER); 
} 

public static void createWindow() { 
    ChatWindow stuff = new ChatWindow(); 
} 

public static void updateWindow() { 
    frame.setVisible(true); 
} 
}

來源

2015-05-16 CatLord

只需添加變量JPanel

static JScrollPane jScrollPane; 
    static JPanel panel;

初始化後JLabel

 panel = new JPanel(); 
     panel.setSize(500, 500); 
     panel.setLayout(new GridLayout(20, 1)); 
     jScrollPane = new JScrollPane(panel); 
     panel.add(label); 
     JLabel textLabel = new JLabel("Welcome to Ring Chat!", SwingConstants.CENTER); 
     textLabel.setPreferredSize(new Dimension(300, 100)); 
     panel.add(textLabel);

和addMessage(String msg)方法添加新JLabel到JPanel這樣。

public static void addMessage(String msg) { 
     JLabel textLabel = new JLabel(msg, SwingConstants.CENTER); 
     textLabel.setPreferredSize(new Dimension(300, 100)); 
     panel.add(textLabel); 
     frame.add(jScrollPane, BorderLayout.CENTER); 
    }

其餘的都是相同..

，而不是增加JLabel使用JPanel，並在上JPanel運行時添加標籤。它會解決你的問題..

來源

2015-05-16 19:37:39 ELITE

向ScrollPane添加多個JLabel

回答

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