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11StaticMethodsAndVariables

11StaticMethodsAndVariables - CSE 114 Computer Science I...

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Mt. Rushmore, South Dakota CSE 114 – Computer Science I Static Methods andVariables
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Static methods Remember the main method header? public static void main(String[] args) What does static mean? associates a method with a particular class name any method can call a static method either: directly from within same class OR using class name from outside class
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Calling static methods directly example public class StaticCallerWithin { public static void main(String[] args) { String song = getSongName(); System.out.println(song); } public static String getSongName() { return "Straight to Hell"; } } Output? Straight to Hell
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Calling external static methods example public class StaticCallerFromOutside { public static void main(String[] args) { System.out.print("Random Number from 1-100: "); double randomNum = Math.random(); System.out.print(randomNum*100 + 1); } } What’s the method header for Math.random ? public static double random()
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Static Variables We can share variables among static methods global variables How? Declare a static variable outside of all methods
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Static Variable Example public class MyProgram { static String myGlobalSong = new String("Jimmy Jazz“);
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