StringBuilder .equals Java

Question

class strb
{

    static public void main(String...string)
    {
         StringBuilder s1 = new StringBuilder(\"Test\");
         StringBuilder s2 = new StringBuild         


        

Answer 1

StringBuilder and StringBuffer not override the equals function of Object class.but string override the equals method. the function of Object is this

public boolean equals(Object obj) {
    return (this == obj);
    }

you could write your code like this.

System.out.println(s1.toString() == s2.toString());
System.out.println(s1.toString().equals(s2.toString()));