In Java, equalsIgnoreCase() method of the String class compares two strings irrespective of the case (lower or upper) of the string. This method returns a boolean value, true if the argument is not null and represents an equivalent String ignoring case, else false.
Syntax of equalsIgnoreCase()
str2.equalsIgnoreCase(str1);
Parameters
- str1: A string that is supposed to be compared.
Return Value
- A boolean value that is true if the argument is not null and it represents an equivalent String ignoring case, else false.
Illustration
Input : str1 = "pAwAn"; str2 = "PAWan" str2.equalsIgnoreCase(str1); Output :true Input : str1 = "powAn"; str2 = "PAWan" str2.equalsIgnoreCase(str1); Output :false Explanation: powan and pawan are different strings.
Note: str1 is a string that needs to be compared with str2.
Internal Implementation of the equalsIgnoreCase() Method
public boolean equalsIgnoreCase(String str) { return (this == str) ? true : (str != null) && (str.value.length == value.length) && regionMatches(true, 0, str, 0, value.length); }
Example of String equalsIgnoreCase() Method
Java
// Java Program to Illustrate equalsIgnoreCase() method // Importing required classes import java.lang.*;
// Main class public class GFG {
// Main driver method
public static void main(String[] args)
{
// Declaring and initializing strings to compare
String str1 = "GeeKS FOr gEEks" ;
String str2 = "geeKs foR gEEKs" ;
String str3 = "ksgee orF geeks" ;
// Comparing strings
// If we ignore the cases
boolean result1 = str2.equalsIgnoreCase(str1);
// Both the strings are equal so display true
System.out.println( "str2 is equal to str1 = "
+ result1);
// Even if we ignore the cases
boolean result2 = str2.equalsIgnoreCase(str3);
// Both the strings are not equal so display false
System.out.println( "str2 is equal to str3 = "
+ result2);
}
} |
Output
str2 is equal to str1 = true str2 is equal to str3 = false