CodesJava

Easy learning with example program codes

Java reflection get super class object


The java.lang.Class provides the methods to examine the runtime properties of the object including its members and type information. For every type of object, the JVM instantiates an immutable instance of java.lang.Class. Using reflection, we can get the metadata of a class at run time.

The getSuperclass() method on a Class object is used to get the super class of the class.

Example

ShapeBase.java

package com.codesjava;
 
public class ShapeBase {
	public void showShapeName(){
		System.out.println("Default shape is circle.");
	}
}

Rectangle.java

package com.codesjava;
 
public class Rectangle extends ShapeBase{
	private int defaultLength = 10;
	private int defaultWidth = 5;
 
	public void drawShape(String color) {
		System.out.println("Rectangle create with following properties: ");
		System.out.println("Length: " + defaultLength);
		System.out.println("Width: " + defaultWidth);
	}
 
}

ReflectionTest.java

package com.codesjava;
 
public class ReflectionTest {
	public static void main(String args[]){
		try {
			Class c=Class.forName("com.codesjava.Rectangle"); 
			c = c.getSuperclass();
			System.out.println(c.getName());
		} catch (Exception e) {
			e.printStackTrace();
		}  
	}
}

Output

com.codesjava.ShapeBase


Copyright © 2018 CodesJava DMCA.com Protection Status SiteMap