String class - The .equals() method

• .equals compares the values in objects
• String s1 = "Hello!';
• String s2 = "Hello!";

if (s1.equals(s2)) {
	System.out.println("Same string");
}

Method header structure

(privacy) (return type) methodName(type parameter)
	Public String toString();

• public means that we can call the method from another class (file)
• private means that we can only call the method from wtihin that class
• a return type indicates that a method call will evaluate to that type when called

String s = object.toString();

• if return type is void, that means we are not returning anything in the method

boolean expressions

ex:

!(i<2) && s.equals("cat")

• evaluates to true or false
• often contains boolean operators:

  • <
  • ≥
  • ≤
  • ==
  • &&
  • II
  • !

what do these expressions evaluate to?

int i = 3;
int k = -2;
String s = "cat";

(!(i < 2) && s.equals("cat")) //true
(!(k < 0) || (i > 5)) //false

//not(3<2) 
//not -2<0 3>5