SWING - FlowLayout Class

Introduction

The class FlowLayout components in a left-to-right flow.

Class Declaration

Following is the declaration for java.awt.FlowLayout class −

public class FlowLayout
   extends Object
      implements LayoutManager, Serializable

Field

Following are the fields for java.awt.BorderLayout class −

• static int CENTER − This value indicates that each row of components should be centered.

• static int LEADING − This value indicates that each row of components should be justified to the leading edge of the container's orientation. For example, to the left in left-to-right orientations.

• static int LEFT − This value indicates that each row of components should be left-justified.

• static int RIGHT − This value indicates that each row of components should be right-justified.

• static int TRAILING − This value indicates that each row of components should be justified to the trailing edge of the container's orientation. For example, to the right in left-to-right orientations.

Class Constructors

Class Methods

Methods Inherited

This class inherits methods from the following classes −

• java.lang.Object

FlowLayout Example

Create the following Java program using any editor of your choice in say D:/ > SWING > com > tutorialspoint > gui >

SwingLayoutDemo.java

package com.tutorialspoint.gui;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingLayoutDemo {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;
   private JLabel msglabel;

   public SwingLayoutDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
      SwingLayoutDemo swingLayoutDemo = new SwingLayoutDemo();  
      swingLayoutDemo.showFlowLayoutDemo();       
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        
      statusLabel.setSize(350,100);
      
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   private void showFlowLayoutDemo(){
      headerLabel.setText("Layout in action: FlowLayout");      

      JPanel panel = new JPanel();
      panel.setBackground(Color.darkGray);
      panel.setSize(200,200);
      FlowLayout layout = new FlowLayout();
      layout.setHgap(10);              
      layout.setVgap(10);
      
      panel.setLayout(layout);        
      panel.add(new JButton("OK"));
      panel.add(new JButton("Cancel"));       
      controlPanel.add(panel);
      mainFrame.setVisible(true);  
   }
}

Compile the program using the command prompt. Go to D:/ > SWING and type the following command.

D:\SWING>javac com\tutorialspoint\gui\SwingLayoutDemo.java

If no error occurs, it means the compilation is successful. Run the program using the following command.

D:\SWING>java com.tutorialspoint.gui.SwingLayoutDemo

Verify the following output.