Compare String With the Java if Statement

public class Main {
    public static void main(String[] args) 
    {

        String str1 = "jeff";
        String str2 = "jeff";
        String str3 = new String("jeff"); // to declare
        String str10 = new String("jeff");
        System.out.println("-----------------Using == Operator ----------------");
        // using == opreater use for Refrence Comapring instead of content comparison.
        if (str1 == str2) 
        { // equal and if Conditon True because both have same Refrence Memory address.
            System.out.println("Str1 And Str2 Equal");
        }
        if (str1 == str3) 
        { // Not Equal If Condition False Because == opreater compares objects refrence.
            System.out.println("Str1 and Str3 are equals");
        }
        if (str10 == str3) 
        { // Not Equal If Condition False Because == opreater compares objects refrence.
            System.out.println("Str10 and Str3 are equals");
        }

        System.out.println("-----------------Using .equal Method----------------");
        // Using .equals Method. for String Content Comparison.

        if (str1.equals(str2)) 
        { // equal and if Conditon True because both have same string
            System.out.println("Str1 And Str2 Equal");
        }
        if (str1.equals(str3)) 
        { // Equal If Condition true String have same Content.
            System.out.println("Str1 and Str3 are equals");
        }
        // compare two strings diffrence
        System.out.println("-----------------Using Compare Method----------------");
        // first string.toCompare(String2)

        System.out.println(str1.compareTo(str2));

    }

}

Output:
-----------------Using == Operator ----------------
Str1 And Str2 Equal
-----------------Using .equal Method----------------
Str1 And Str2 Equal
Str1 and Str3 are equals
-----------------Using Compare Method----------------
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