Java Swing | JSplitPane with Examples

Last Updated : 14 Oct, 2019

JSplitPane is a part of Java Swing. JSplitPane is used to divide only two components. JSplitPane is to use resize the components . By using the JSplitPane the user can manually resize the component till its minimum size . JSplitPane can be of two types, one is the vertical and horizontal splitpane Constructor of JSplitPane are:

JSplitPane() : creates a new split pane that is oriented horizontally
JSplitPane(int o) : creates a new split pane with orientation mentioned.
JSplitPane(int o, boolean r) : creates a new split pane with orientation and redrawing style mentioned.
JSplitPane(int o, boolean r, Component l, Component r) : creates a new split pane with orientation, redrawing style and left and right component mentioned.
JSplitPane(int o, Component l, Component r): creates a new split pane with orientation and left and right component mentioned.

Commonly used Functions of JSplitPane are :

getOrientation() : returns the orientation of the split pane
getRightComponent() : returns the right component of the splitpane
getTopComponent() : returns the top component of the splitpane
isContinuousLayout() :returns the continuous layout property
getBottomComponent() : returns the Bottom component of the splitpane
setRightComponent(Component c) : the right component of the splitpane is set to c
setLeftComponent(Component c) : the left component of the splitpane is set to c
setTopComponent(Component c) : the top component of the splitpane is set to c
setBottomComponent(Component c) : the bottom component of the splitpane is set to c
setUI(SplitPaneUI ui) : Sets the Look and feel object that renders this component.
setResizeWeight(double v) :Specifies how to distribute extra space when the size of the split pane changes.
setOneTouchExpandable(boolean n) : Sets the value of the oneTouchExpandable property, whichwhen true provides a UI widget that can collapse or expand the components on click
setDividerLocation(int l) : Sets the location of the divider.
setDividerSize(int n) : Sets the size of the divider.
setLastDividerLocation(int n) : Sets the last location the divider.
setDividerLocation(double p) : Sets the divider location as a percentage of the JSplitPane's size.
setContinuousLayout(boolean n) : Sets the value of the continuousLayout property, which must be true for the child components to be continuously redisplayed .
remove(int index) : removes the Component at the specified index.
remove(Component c) : Removes the child component from the pane.
isOneTouchExpandable() : returns the oneTouchExpandable property.
isContinuousLayout() : returns the continuousLayout property.
getMinimumDividerLocation() : returns the minimum location of the divider .
getMaximumDividerLocation() : Returns the maximum location of the divider .
getDividerSize() : Returns the size of the divider.
getDividerLocation() : returns the last value passed to setDividerLocation.
addImpl(Component c, Object co, int i) : adds the specified component to this split pane.
setUI(SplitPaneUI ui) : sets the look and feel object that renders this component.
getUI() : returns the look and feel object that renders this component.
paramString() : returns a string representation of this JSplitPane.
getUIClassID() : returns the name of the Look and feel class that renders this component.
getAccessibleContext() : gets the AccessibleContext associated with this JSplitPane.

The Following programs will illustrate the use of JSplitPane 1. Program to create a horizontal JSplitPane to separate two text areas

Java

// Java Program to create a horizontal JSplitPane 
// to separate two text areas
import javax.swing.event.*;
import java.awt.*;
import javax.swing.*;
class solve extends JFrame {

    // frame
    static JFrame f;

    // text areas
    static JTextArea t1, t2;

    // main class
    public static void main(String[] args)
    {
        // create a new frame
        f = new JFrame("frame");

        // create a object
        solve s = new solve();

        // create a panel
        JPanel p1 = new JPanel();
        JPanel p = new JPanel();

        // create text areas
        t1 = new JTextArea(10, 10);
        t2 = new JTextArea(10, 10);

        // set texts
        t1.setText("this is first text area");
        t2.setText("this is second text area");

        // add text area to panel
        p1.add(t1);
        p.add(t2);

        // create a splitpane
        JSplitPane sl = new JSplitPane(SwingConstants.HORIZONTAL, p1, p);

        // add panel
        f.add(sl);

        // set the size of frame
        f.setSize(300, 300);

        f.show();
    }
}

Output :

2.Program to create a Vertical JSplitPane to separate two text areas

Java

// Java Program  to create a vertical 
// JSplitPane to separate two text areas
import javax.swing.event.*;
import java.awt.*;
import javax.swing.*;
class solve extends JFrame {

    // frame
    static JFrame f;

    // text areas
    static JTextArea t1, t2;

    // main class
    public static void main(String[] args)
    {
        // create a new frame
        f = new JFrame("frame");

        // create a object
        solve s = new solve();

        // create a panel
        JPanel p1 = new JPanel();
        JPanel p = new JPanel();

        // create text areas
        t1 = new JTextArea(10, 10);
        t2 = new JTextArea(10, 10);

        // set texts
        t1.setText("this is first text area");
        t2.setText("this is second text area");

        // add text area to panel
        p1.add(t1);
        p.add(t2);

        // create a splitpane
        JSplitPane sl = new JSplitPane(SwingConstants.VERTICAL, p1, p);

        // set Orientation for slider
        sl.setOrientation(SwingConstants.VERTICAL);

        // add panel
        f.add(sl);

        // set the size of frame
        f.setSize(300, 300);

        f.show();
    }
}

Output :

2. Java Program to create nested JSplitPane, one of them is one Touch Expandable

Java

// Java Program to create nested JSplitPane, 
// one of them is one Touch Expandable
import javax.swing.event.*;
import java.awt.*;
import javax.swing.*;
class solve extends JFrame {

    // frame
    static JFrame f;

    // text areas
    static JTextArea t1, t2, t3, t4;

    // main class
    public static void main(String[] args)
    {
        // create a new frame
        f = new JFrame("frame");

        // create a object
        solve s = new solve();

        // create a panel
        JPanel p1 = new JPanel();
        JPanel p = new JPanel();
        JPanel p2 = new JPanel();
        JPanel p3 = new JPanel();

        // create text areas
        t1 = new JTextArea(10, 10);
        t2 = new JTextArea(10, 10);
        t3 = new JTextArea(10, 10);
        t4 = new JTextArea(10, 10);

        // set texts
        t1.setText("this is first text area");
        t2.setText("this is second text area");
        t3.setText("this is third text area");
        t4.setText("this is fourth text area");

        // add text area to panel
        p1.add(t1);
        p.add(t2);
        p2.add(t3);
        p3.add(t4);

        // create a splitpane
        JSplitPane sl = new JSplitPane(SwingConstants.VERTICAL, p1, p);
        JSplitPane s2 = new JSplitPane(SwingConstants.VERTICAL, p2, p3);

        // set Orientation for slider
        sl.setOrientation(SwingConstants.VERTICAL);
        s2.setOrientation(SwingConstants.VERTICAL);

        s2.setOneTouchExpandable(true);

        // set divider location
        sl.setDividerLocation(70);

        // set Layout for frame
        f.setLayout(new FlowLayout());

        // add panel
        f.add(sl);
        f.add(s2);

        // set the size of frame
        f.setSize(600, 300);

        f.show();
    }
}