Generics Interface in java

/*In similar way, we can create generic interfaces in java. We can also have multiple type parameters as in Map interface. Again we can provide parameterized value to a parameterized type also, for example new HashMap<String, List<String>>(); is valid.*/
package java.lang;
import java.util.*;

public interface Comparable<T> {
    public int compareTo(T o);
}

Source: journaldev.com

Generics Interface in java

/*Suppose we want to restrict the type of objects that can be used in the parameterized type, for example in a method that compares two objects and we want to make sure that the accepted objects are Comparables. To declare a bounded type parameter, list the type parameter’s name, followed by the extends keyword, followed by its upper bound, similar like below method.

The invocation of these methods is similar to unbounded method except that if we will try to use any class that is not Comparable, it will throw compile-time error.

Bounded type parameters can be used with methods as well as classes and interfaces.

Java Generics supports multiple bounds also, i.e <T extends A & B & C>. In this case, A can be an interface or class. If A is class then B and C should be an interface. We can’t have more than one class in multiple bounds.*/
public static <T extends Comparable<T>> int compare(T t1, T t2){
		return t1.compareTo(t2);
	}

Source: journaldev.com

Similar codes

0 vote312 views1 answer
For loop in java as long as array
Java
0 vote340 views1 answer
Change upper bar colour android studio
Java
0 vote323 views1 answer
Crear objetos automaticamente java
Java
1 vote330 views2 answers
Input arraylist in java
Java
1 vote308 views1 answer
CSV to 2D array javaescript
Java
0 vote366 views2 answers
Remove letter from middle of string javasdript
Java
16 votes300 views4 answers
Java add values to array
Java
0 vote374 views1 answer
Region in android studio
Java
0 vote312 views1 answer
How to accept only numbers and whitespace in java
Java
0 vote314 views3 answers
Resttemplate get rest api call in java
Java