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public boolean isEmpty()

public class Main {
    public static void main(String[] args) {
        String myStr1 = "tutorialpro";  
        String myStr2 = "";        // Empty string
        String myStr3 = "    ";    // Multiple spaces, length() is not 0 
        System.out.println("Is myStr1 empty: " + myStr1.isEmpty());
        System.out.println("Is myStr2 empty: " + myStr2.isEmpty());
        System.out.println("Length of myStr3: " + myStr3.length());
        System.out.println("Is myStr3 empty: " + myStr3.isEmpty());
    }
}

Is myStr1 empty: false
Is myStr2 empty: true
Length of myStr3: 4
Is myStr3 empty: false