How to compare strings in java without case sensitivity

In order to perform case-ignoring comparisons in Java, you can call the equalsIgnoreCase() method. When comparing two strings, it will think A-Z and a-z are the same.

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equalsIgnoreCase() method is used to compare a string with the specified object, regardless of case.

Syntax

public boolean equalsIgnoreCase(String anotherString)

Parameters

anObject -- The object to compare with the string.

Return value

Returns true if the given object is equal to the string; otherwise returns false.

Example

public class Test {
    public static void main(String args[]) {
        String Str1 = new String("runoob");
        String Str2 = Str1;
        String Str3 = new String("runoob");
        String Str4 = new String("RUNOOB");
        boolean retVal;

        retVal = Str1.equals( Str2 );
        System.out.println("返回值 = " + retVal );

        retVal = Str3.equals( Str4);
        System.out.println("返回值 = " + retVal );

        retVal = Str1.equalsIgnoreCase( Str4 );
        System.out.println("返回值 = " + retVal );
    }
}

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