Java String equalsIgnoreCase() Method

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.

Input: str1 = "pAwAn";
str2 = "PAWan"
Output: true

Input: str1 = "piwAn";
str2 = "PAWan"
Output: false

Example:

public class Geeks {
  
    public static void main(String[] args) {
      
        String str1 = "GeeKS FOr gEEks";
        String str2 = "geeKs foR gEEKs";
        String str3 = "ksgee orF geeks";

        // Comparing str1 and str2
        boolean res1 = str2.equalsIgnoreCase(str1);

        System.out.println("str2 is equal to str1 = "+ res1);

        // Comparing str2 and str3
        boolean res2 = str2.equalsIgnoreCase(str3);

        System.out.println("str2 is equal to str3 = "+ res2);
    }
}

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

Syntax:

str2.equalsIgnoreCase(str1);

Here str1 is the 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.

Internal Implementation

public boolean equalsIgnoreCase(String str) {
return (this == str) ? true
: (str != null)
&& (str.value.length == value.length)
&& regionMatches(true, 0, str, 0, value.length);
}

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Article Tags :

• Misc
• Java
• Java-Strings
• Java-lang package
• Java-Functions

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Practice Tags :

• Java
• Java-Strings
• Misc