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import java.util.*;

import java.util.concurrent.*;

/* T can only be the child classes of Number class i.e it can be Byte ,Short ,Integer,Long Float,Double .If we pass any other type parameter we will get compile time error.

*/

class Test<T extends Number>{

T ob;

Test(T ob){

this.ob = ob;

}

public void show(){

System.out.println(ob);

}

}

public class GenericTypeBounding{

public static void main(String[] args){

Test<Integer> t1 = new Test<Integer>(10);

t1.show();

// Uncomment this to get the compile time error

// Test<String> t2 = new Test<String>("10");

// t2.show();

}

}