Difference between Constructors and Methods in Java

Constructors are special methods used to initialize objects whereas methods are used to execute certain statements. Following are the important differences between Constructors and Methods.

Example of Constructor vs Method

JavaTester.java

public class JavaTester {
   int num;
   JavaTester(){
      num = 3;
      System.out.println("Constructor invoked. num: " + num);
   }
   public void init(){
      num = 5;
      System.out.println("Method invoked. num: " + num);
   }
   public static void main(String args[]) {
      JavaTester tester = new JavaTester();
      tester.init();
   }
}

Output

Constructor invoked. num: 3
Method invoked. num: 5