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 vote171 views1 answer
Illmatic
Java
5 votes213 views2 answers
How to add elements in array in java using for loop
Java
0 vote161 views1 answer
Xml button color not changing
Java
1 vote159 views1 answer
Java structure example
Java
0 vote221 views2 answers
Close GUI in jvava
Java
0 vote205 views1 answer
Make handler running continuously
Java
-1 vote176 views4 answers
Android date time
Java
0 vote182 views1 answer
Jasypt-spring-boot
Java Spring
0 vote158 views1 answer
Kotless scheduled event
Java
1 vote150 views1 answer
Java replace string case insensitive
Java