import javax.swing.*;
import java.awt.Dimension;
public class JSplitPaneDemo
{
 public static void main (String[] args)
 {
  
  JButton button = new JButton ("button");
  JLabel label = new JLabel ("label");
  
  JSplitPane splitPane = new JSplitPane ();
  splitPane.setOneTouchExpandable (true);//是该分隔面板的分隔条显示出箭头
  splitPane.setContinuousLayout (true);
  splitPane.setPreferredSize (new Dimension (500,600));//设置大小
  splitPane.setOrientation (JSplitPane.HORIZONTAL_SPLIT);
  splitPane.setLeftComponent (button);//same as: splitPane.setTopComponent(button);
  splitPane.setRightComponent (label);//same as: splitPane.setBottomComponent(label);
  splitPane.setDividerSize (5);//设置分隔条的粗细
  splitPane.setDividerLocation(200);//设置分隔条的位置，基于setPreferredSize方法中的值，
           //此处为200/500，大概在中间靠左

  JFrame frame = new JFrame ("JSplitPanelDemo");
  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
  frame.setVisible (true);
  frame.setContentPane (splitPane);
  frame.pack ();//此方法必须在加载splitPane之后调用
 }
}

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