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Java Java Objects (Retired) Harnessing the Power of Objects Methods and Constants

Posted by Amith Raj
Amith Raj
570 Points

what is instance of a class ??

he keeps saying by using static keyword we do not need to create an instance of the class what does he mean

1 Answer

Alexander Nikiforov
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Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points
Alexander Nikiforov
.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points 
public SomeClassWithStaticMethod() {
   public static void someStaticMethod() {
         // some code
   }
}

// When invoking in other class

public class Main {
    public static void main(String[] args) {
      // we can do the following
      // use someMethod statically, i.e. without creating instance of 
      // SomeClassWithStaticMethod
      SomeClassWithStaticMethod.someStaticMethod();
   }
}

// normal class
public class NormalClass {
  public void normalMethod() {
    // code
  }
}

// When invoking in Main

public class Main {
    public static void main(String[] args) {
      // we have to create instance of NormalClass
      NormalClass normalClass = new NormalClass();
      normalClass.normalMethod();
      // we cant write NormalClass.normalMethod()
   }
}
Amith Raj
Amith Raj
570 Points

thanks