Can you use this() and super() both in a constructor in Java?

No, because this() and super() must be the first statement in the class constructor.

Example:

public class Test{
    Test()
     {
         super();
         this();
         System.out.println(“Test class object is created”);
     }
     public static void main(String []args){
     Test t = new Test();
     }
}

Output:

Test.java:5: error: call to this must be first statement in constructor

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