The implements keyword in Java language

In this tutorial, we will discuss about The implements keyword in Java language

The Java language implements keyword is using to implement basic concrete of method definition in an interface. The implemented class must provide concrete implementation for the method definition by the interface if not the class must be abstract.

The following example explains how to implement a class using interface and provide details of implementation for the interface’s methods

The implements keyword in Java language — Usage of implements keyword

Syntax

interface {
public void method1();            //method definition_1 No declaration inside interface
public void method2();           //method definition_1 No declaration inside interface
}

class  implements 
public void method1(){
//method 1 implementation
}
public void method2(){
//method2 implementation
}
}

Example

Interface School{
void beginning(); //unimplemented methods
void ending();
}
class student implements school{
void beginning(){
// beginning of the school}  //implements here
void ending(){
//Ending of the school
}
}

a class can implement multiple interface. the interface names are separated by commas

Example is given below

interface school{} //interface_one


interface teacher{} //interface_two


class student implements school,teacher{}

This is a single class implements by multiple interfaces

There are other Java language keywords that are similar to this keyword

extends keyword in java

public Key words in Java

static keyword in Java language

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Transient keyword in Java

Package keyword in Java

class keyword in Java

boolean keyword in Java

break keyword in Java

do keyword in Java

double keyword in Java

This keyword in Java

final keyword in Java

switch keyword in Java

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