GridLayout in Java with Examples and Implementation

Introduction 

GridLayout is a layout manager that arranges the components of a container in a rectangular grid. One component is placed in each rectangle of the container, which is divided into equal-sized rectangles. 

In this article, we will discuss gridlayout in java, the types of grid layout constructors, swing class in java, and examples of grid layout. We will start with brief introduction to gridlayout in java and swing class. 

Java Swing  

Java Swing is a toolkit for creating a graphical user interface (GUI) in Java that includes a large number of widgets. It's part of the Java Foundation Classes (JFC) and comes with a number of packages for creating Java-rich desktop applications. Swing has built-in controls for displaying HTTP or rich text format, such as trees, image buttons, tabbed windows, sliders, toolbars, color choosers, tables, and text areas (RTF). Swing components are platform-independent because they are developed entirely in Java.

Also read swing component in Java

How to declare the Gridlayout class

Class GridLayout extends Object
Implements LayoutManager, Serializable

Constructor in gridlayout

Now let’s understand the types of gridlayout constructor with the help of some examples

Java GridLayout() constructor

//program to implement the Gridlayout in java with constructor.
import java.awt.*;    
import javax.swing.*;    
    
public class GridLayoutExample  
{    
JFrame frameObj;    
  
// constructor  
GridLayoutExample()  
{    
frameObj = new JFrame();    
  
// creating buttons  
JButton BUTTON1 = new JButton("C");    
JButton BUTTON2 = new JButton("O");    
JButton BUTTON3 = new JButton("D");    
JButton BUTTON4 = new JButton("I");    
JButton BUTTON5 = new JButton("N");    
JButton BUTTON6 = new JButton("G");    
JButton BUTTON7 = new JButton("N");        
JButton BUTTON8 = new JButton("I");        
JButton BUTTON9 = new JButton("N");        
JButton BUTTON10 = new JButton("J");        
JButton BUTTON11 = new JButton("A");        
JButton BUTTON12= new JButton("S");        
// we are just trying to making the row count constant.
frameObj.add(BUTTON1); 
frameObj.add(BUTTON2);
frameObj.add(BUTTON3);  
frameObj.add(BUTTON4);
frameObj.add(BUTTON5); 
frameObj.add(BUTTON6);  
frameObj.add(BUTTON7); 
frameObj.add(BUTTON8); 
frameObj.add(BUTTON9); 
frameObj.add(BUTTON10); 
frameObj.add(BUTTON11); 
frameObj.add(BUTTON12); 
  
// setting up the grid layout using the parameterless constructor    
frameObj.setLayout(new GridLayout());    

  
frameObj.setSize(500, 500);    
frameObj.setVisible(true);    
}  
  
// main method  
public static void main(String argvs[])   
{    
new GridLayoutExample();    
}    
}    

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Java GridLayout(int row, int column) constructor

//program to represent Gridlayout in java with parameterised constructor.
import java.awt.*;    
import javax.swing.*;    
public class GridLayoutExample{    
JFrame frame;    
GridLayoutExample(){    
    //building the frames
    frame=new JFrame();    
    JButton button1=new JButton("q");    
    JButton button2=new JButton("w");    
    JButton button3=new JButton("e");    
    JButton button4=new JButton("r");    
    JButton button5=new JButton("t");    
    JButton button6=new JButton("y");    
    JButton button7=new JButton("u");    
    frame.add(button1);    
    frame.add(button2);    
    frame.add(button3);    
    frame.add(button4);    
    frame.add(button5);    
    frame.add(button6);    
    frame.add(button7);    
  
    // pasing the grid layout of rows and columns    
    frame.setLayout(new GridLayout(4,4));    
    frame.setSize(500,300);    
    frame.setVisible(true);    
}    
public static void main(String[] args) {    
    new GridLayoutExample();    
}    
}    

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Output

Java GridLayout(int row, int column, int hgap, int vgap) constructor

//program to represent Gridlayout in java with parameterised constructor.
import java.awt.*;    
import javax.swing.*;    
    
public class GridLayoutExample1  
{    
  
JFrame frameObj;    
  
// constructor  
GridLayoutExample1()  
{    
frameObj = new JFrame();    
  
// creating 9 buttons  
JButton button1 = new JButton("a");    
JButton button2 = new JButton("s");    
JButton button3 = new JButton("d");    
JButton button4 = new JButton("f");    
JButton button5 = new JButton("g");    
JButton button6 = new JButton("h");    
JButton button7 = new JButton("j");    
JButton button8 = new JButton("k");    
JButton button9 = new JButton("l");    
JButton button10 = new JButton("x");    
JButton button11 = new JButton("z");    
frameObj.add(button1);
frameObj.add(button2);
frameObj.add(button3);
frameObj.add(button4);
frameObj.add(button5);
frameObj.add(button6);
frameObj.add(button7);
frameObj.add(button8);
frameObj.add(button9);
frameObj.add(button10);
frameObj.add(button11);
// grid layout   
// creating a grid with the horizontal gap and vertical gap   
frameObj.setLayout(new GridLayout(4, 4, 20, 25));    
frameObj.setSize(300, 300);    
frameObj.setVisible(true);    
}  
// main method  
public static void main(String argvs[])   
{    
new GridLayoutExample1();    
}    
}    

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