Table of Contents

Type Casting

• Integer Division:

  • When you divide two integers in Java, the result will be rounded down.
  • To solve this, cast one of the integers as a double before dividing.
  • Note: if you type cast after the division, it’ll be too late. The result will already be rounded.

  int a = 5;
  int b = 2;
  
  a / b;				// 2, integer
  (double) a / b;		 // 2.5, double
  a / (double) b;	  	 // 2.5, double
  (double) (a / b);	 // 2.0, double
  

String Equality

• String.equals(s1, s2) tests if two strings say the same thing.

• == tests if two strings are the same object

  String myString = "hello";
  
  myString.equals("hello");	// True
  myString == "hello";		// False.
  myString == myString		// True