Continuously move the divider and resize its child components while the user is dragging the divider : JSplitPane « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JSplitPane

import javax.swing.JButton;
import javax.swing.JSplitPane;

public class Main {
  public static void main(String[] argv) throws Exception {
    JButton topComponent = new JButton("top");
    JButton bottomComponent = new JButton("bottom");

    JSplitPane vpane = new JSplitPane(JSplitPane.VERTICAL_SPLIT, topComponent, bottomComponent);

    boolean b = vpane.isContinuousLayout(); // false by default

    // Set the split pane to continuously resize the child components which the divider is dragged
    vpane.setContinuousLayout(true);
  }
}

14.50.JSplitPane
	14.50.1.	JSplitPane
	14.50.2.	Moving the JSplitPane Divider
	14.50.3.	Setting Orientation: JSplitPane.VERTICAL_SPLIT or JSplitPane.HORIZONTAL_SPLIT
	14.50.4.	Create a left-right split pane
	14.50.5.	Create a top-bottom split pane
	14.50.6.	Resizing Components and Working with a One-Touch Expandable Divider
	14.50.7.	Nested JSplitPane
	14.50.8.	Listening for JSplitPane Property Changes
	14.50.9.	set Divider Location for JSplitPane
	14.50.10.	Continuously move the divider and resize its child components while the user is dragging the divider
	14.50.11.	The split pane supports a one-touch-expandable capability that allows the user to conveniently move the divider to either end with a single click
	14.50.12.	Distributing Space When a JSplitPane Container Is Resized
	14.50.13.	Getting the Setting the Children in a JSplitPane Container
	14.50.14.	Customizing a JSplitPane Look and Feel