Convert Uppercase Character to Lowercase Using Bit Manipulation

package org.wesome.dsalgo;

public class ConvertUppercaseToLowercase {
    public static final char SPACE = ' ';
    public static int a = 97;

    public static char convertUppercaseToLowercase(char ch) {
        System.out.println("character is = " + ch + ", its ascii value is " + Integer.valueOf(ch) + ", ASCII value of space is " + Integer.valueOf(SPACE));
        return (char) (ch | SPACE);
    }
}

package org.wesome.dsalgo;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

import java.util.stream.IntStream;

import static org.wesome.dsalgo.ConvertUppercaseToLowercase.a;
import static org.wesome.dsalgo.ConvertUppercaseToLowercase.convertUppercaseToLowercase;

public class ConvertUppercaseToLowercaseTest {
    @Test
    void UppercaseToLowercaseTest1() {
        Assertions.assertEquals('a', convertUppercaseToLowercase('A'));
    }

    @Test
    void UppercaseToLowercaseTest2() {
        Assertions.assertEquals('z', convertUppercaseToLowercase('Z'));
    }

    @Test
    void UppercaseToLowercaseTest3() {
        IntStream.rangeClosed(65, 90).forEach(i -> {
            Assertions.assertEquals(a, convertUppercaseToLowercase((char) i));
            a++;
        });
    }
}

plugins {
    id 'java'
    id "io.freefair.lombok" version "6.4.1"
}

group = 'org.wesome'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = JavaVersion.VERSION_1_8

configurations {
    compileOnly {
        extendsFrom annotationProcessor
    }
}

repositories {
    mavenCentral()
}

dependencies {
    testImplementation 'org.junit.jupiter:junit-jupiter:5.6.2'
}

test {
    useJUnitPlatform()
}