Java Swing Shape

Java Swing Shape

Java Swing Shape has several classes that am going to explain.To start with is Point class.

Point class

Point class is used to represent a certain location in a two-dimensional space i.e., x and y values which are coordinates.This class  is contained in java.awt package.

Example

[

import java.awt.Point;

public class JavaSwingShape {
    JavaSwingShape (){

        //Creates a point with set location        Point p=new Point(20,30);
        //gets X coordinates        int x=(int)p.getX();
        //gets y coordinates        int y=(int)p.getY();
        //creates empty point         Point point=new Point();
        //sets point location        point.setLocation(20,30);

    }
}

]

Below codes creates a JButton Swing components and sets its location using Point.

[

import java.awt.Point;
import javax.swing.JButton;

public class JavaSwingShape {
    JavaSwingShape (){
        JButton button=new JButton("Save");
        button.setLocation(new Point(20,25));
        //below code does the same        button.setLocation(20,25);


    }
}

]

Dimension Class

Dimension class is used to specify component height and width.Its contained in package java.awt.

Example.

[

import javax.swing.JButton;
import java.awt.Dimension;

public class JavaSwingShape {
    JavaSwingShape (){
        JButton button=new JButton("Save");
        Dimension d=new Dimension(20,40);
        button.setSize(d);
        //below code does the same task       

         button.setSize(20, 40);


    }
}

]

We can now get the JButton size using Dimension class.

[

import javax.swing.JButton;

import java.awt.Dimension;

public class JavaSwingShape {
    JavaSwingShape ()
    {
        JButton button=new JButton("Save");
        button.setSize(20, 40);

        Dimension d=new Dimension();
        int width=button.getWidth();
        int height=button.getHeight();

        System.out.println("Width is "+width +"  Height is" + height);


    }
    public static void main(String args[])
    {
        new JavaSwingShape();
    }
}

]

Inset Class.

Inset class is used to represent spaces in between a component,i.e left,right ,top and bottom.This class is contained in java.awt package.

[Insets inset = new Insets(20, 5, 5, 5);]

Its pretty easy to get JFrame insets.

[

import java.awt.Dimension;
import java.awt.Insets;
import javax.swing.JFrame;

public class JavaSwingShape {
    JavaSwingShape ()
    {
        JFrame frame=new JFrame();
        Insets insets=frame.getInsets();
        int top=insets.top;
        int bottom=insets.bottom;
        int left=insets.left;
        int right=insets.right;


    }
    public static void main(String args[])
    {
        new JavaSwingShape();
    }
}

]

Rectangle class

java.awt rectangle class is used to represent rectangle shape.A rectangle has four points i.e width,height,x and y coordinates.

Different Rectangle class constructors.

[

import java.awt.Dimension;
import java.awt.Insets;
import javax.swing.JFrame;
import java.awt.Rectangle;
import java.awt.Point;
import java.awt.Dimension;

public class JavaSwingShape {
    JavaSwingShape ()
    {

        //creates a rectangle with X and Y coordinates        

 //set at zero,height and width zero value     

   Rectangle r1  = new Rectangle();
        //creates rectangle object using Point object as x and y coordinates       

 //with zero height and width values       

Rectangle r2  = new Rectangle(new Point(15, 15));

        //creates rectangle object using Point object as x and y coordinates      

  //with height and width set by Dimension object     

   Rectangle r3  = new Rectangle(new Point(10,  10),  new Dimension(200, 100));
        //creates a rectangle with set values of x,y,width and height   

     Rectangle r4  = new Rectangle(10,10,200,100);


    }
    public static void main(String args[])
    {
        new JavaSwingShape();
    }
}

]