Java Tutorial
Control Statements
Java Object Class
Java Inheritance
- inheritance(is-a)
- aggregation(has-a)
Java Polymorphism
Java Abstraction
Java Encapsulation
Java Array
- java-array
Java OOPs Misc
Java String
Java String Methods
Java Regex
- java-regex-api
Exception Handling
Java Inner Class
Java Multithreading
Java Synchronization
Java I/O
Java Serialization
- java-serialization
- java-transient-keyword
Java Networking
Java AWT & Events
Java Swing
Java Swing Apps
LayoutManagers
JavaFX Tutorial
JavaFX 2D Shapes
JavaFX Text
- javafx-text
JavaFX Effects
JavaFX Transformation
JavaFX Animation
JavaFX 3D Shapes
JavaFX Layouts
JavaFX UI
JavaFX Charts
JavaFX CSS
- javafx-css
Media with JavaFX
JavaFX Event Handling
Java Applet
Java Reflection
Java 8 Date Time
Java Date (Classical)
Java Date Format
- dateformat
- simpledateformat
Current Date Time
- get-current-date-time
Java Conversion
Java Collections
Java JDBC
Java New Features
- java-new-features
Java 9 Features
Java 8 Features
Java 7 Features
Java 4/5 Features
RMI
- java-rmi
Internationalization

Java String equals()

The java string equals() method compares the two given strings based on the content of the string. If any character is not matched, it returns false. If all characters are matched, it returns true.

The String equals() method overrides the equals() method of Object class.

Internal implementation

	 public boolean equals(Object anObject) {
        if (this == anObject) {
            return true;
        }
        if (anObject instanceof String) {
            String anotherString = (String) anObject;
            int n = value.length;
            if (n == anotherString.value.length) {
                char v1[] = value;
                char v2[] = anotherString.value;
                int i = 0;
                while (n-- != 0) {
                    if (v1[i] != v2[i])
                            return false;
                    i++;
                }
                return true;
            }
        }
        return false;
    }

Signature

Parameter

anotherObject : another object i.e. compared with this string.

Returns

true if characters of both strings are equal otherwise false.

Overrides

equals() method of java Object class.

Java String equals() method example

public class EqualsExample{
public static void main(String args[]){
String s1="w3cschoool";
String s2="w3cschoool";
String s3="JAVATPOINT";
String s4="python";
System.out.println(s1.equals(s2));//true because content and case is same
System.out.println(s1.equals(s3));//false because case is not same
System.out.println(s1.equals(s4));//false because content is not same
}}

Test it Now

true
false
false

Java String equals() Method Example 2

The equals() method compares two strings and can be used in if-else control structure.

public class EqualsExample {
	public static void main(String[] args) {
		String s1 = "w3cschoool";  
		String s2 = "w3cschoool";  
		String s3 = "Javatpoint";
		System.out.println(s1.equals(s2)); // True because content is same  
		if (s1.equals(s3)) {
			System.out.println("both strings are equal");
		}else System.out.println("both strings are unequal");	
	}
}

true
both strings are unequal

Java String equals() Method Example 3

Let's see one more example to test the equality of string present in the list.

import java.util.ArrayList;
public class EqualsExample3 {
	public static void main(String[] args) {
		String str1 = "Mukesh";
		ArrayList<String> list = new ArrayList<>();
		list.add("Ravi"); 
		list.add("Mukesh");
		list.add("Ramesh");
		list.add("Ajay");
		for (String str : list) {
			if (str.equals(str1)) {
				System.out.println("Mukesh is present");
			}
		}
	}
}

Mukesh is present

Next TopicJava String equalsIgnoreCase()

« prev next »

Hot Tutorials

Contact US

Email:[email protected]

String equals()

10/30

Java Tutorial

Control Statements

Java Object Class

Java Inheritance

Java Polymorphism

Java Abstraction

Java Encapsulation

Java Array

Java OOPs Misc

Java String

Java String Methods

Java Regex

Exception Handling

Java Inner Class

Java Multithreading

Java Synchronization

Java I/O

Java Serialization

Java Networking

Java AWT & Events

Java Swing

Java Swing Apps

LayoutManagers

JavaFX Tutorial

JavaFX 2D Shapes

JavaFX Text

JavaFX Effects

JavaFX Transformation

JavaFX Animation

JavaFX 3D Shapes

JavaFX Layouts

JavaFX UI

JavaFX Charts

JavaFX CSS

Media with JavaFX

JavaFX Event Handling

Java Applet

Java Reflection

Java 8 Date Time

Java Date (Classical)

Java Date Format

Current Date Time

Java Conversion

Java Collections

Java JDBC

Java New Features

Java 9 Features

Java 8 Features

Java 7 Features

Java 4/5 Features

RMI

Internationalization