How to use equals() and equalsIgnoreCase() in Java.

The equals() method

This method compares this string to the specified object. The result is true if and only if the argument is not null and is a String object that represents the same sequence of characters as this object.

Example

import java.lang.*;
public class StringDemo {
   public static void main(String[] args) {
      String str1 = "sachin tendulkar";
      String str2 = "amrood admin";
      String str3 = "amrood admin";
     
      // checking for equality
      boolean retval1 = str2.equals(str1);
      boolean retval2 = str2.equals(str3);
     
      // prints the return value
      System.out.println("str2 is equal to str1 = " + retval1);
      System.out.println("str2 is equal to str3 = " + retval2);
   }
}

Output

str2 is equal to str1 = false
str2 is equal to str3 = true

The equalsIgnoreCase() method

This method is equal to the ignoreCase() method, except Two strings are considered equal ignoring case if they are of the same length and corresponding characters in the two strings are equal ignoring case.

Example

import java.lang.*;
public class StringDemo {
   public static void main(String[] args) {
      String str1 = "sachin tendulkar";
      String str2 = "amrood admin";
      String str3 = "AMROOD ADMIN";
     
      // checking for equality with case ignored
      boolean retval1 = str2.equalsIgnoreCase(str1);
      boolean retval2 = str2.equalsIgnoreCase(str3);
     
      // prints the return value
      System.out.println("str2 is equal to str1 = " + retval1);
      System.out.println("str2 is equal to str3 = " + retval2);
   }
}

Output

str2 is equal to str1 = false
str2 is equal to str3 = true