JScrollPane的使用滚动箭头，但没有滚动条

Question

我要像这张图片上滚动面板创建：

随着组件两侧，没有滚动条可见的箭头。只需要水平滚动。它可以使用JScrollPane完成吗？

Answer 1

您可以通过使用一个滚动面板，并通过创建自己的按钮，将使用滚动条的操作让你自己的组件：

import java.awt.*; 
import javax.swing.*; 
import javax.swing.plaf.basic.*; 

public class ScrollPaneSSCCE extends JPanel 
{ 
    public ScrollPaneSSCCE() 
    { 
     setLayout(new BorderLayout()); 

     JTextArea textArea = new JTextArea(1, 80); 
     textArea.setText("Hopefully this will answer your question"); 
     JScrollPane scrollPane = new JScrollPane(textArea); 
     scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER); 
     add(scrollPane); 

     JScrollBar horizontal = scrollPane.getHorizontalScrollBar(); 

     BasicArrowButton west = new BasicArrowButton(BasicArrowButton.WEST); 
     west.setAction(new ActionMapAction("", horizontal, "negativeUnitIncrement")); 
     add(west, BorderLayout.WEST); 

     BasicArrowButton east = new BasicArrowButton(BasicArrowButton.EAST); 
     east.setAction(new ActionMapAction("", horizontal, "positiveUnitIncrement")); 
     add(east, BorderLayout.EAST); 
    } 

    private static void createAndShowUI() 
    { 
     JFrame frame = new JFrame("ScrollPaneSSCCE"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.add(new ScrollPaneSSCCE(), BorderLayout.NORTH); 
     frame.setSize(100, 100); 
     frame.setLocationByPlatform(true); 
     frame.setVisible(true); 
    } 

    public static void main(String[] args) 
    { 
     EventQueue.invokeLater(new Runnable() 
     { 
      public void run() 
      { 
       createAndShowUI(); 
      } 
     }); 
    } 
} 

您还需要使用Action Map Action类。