Author: kpark

Person Struct (in C) PersonStructC

Person Class (in C++) PersonClassCPlusPlus

Person Class (in C#) PersonClassCSharp

Person Class (in Java) PersonClassJava

 

Object − objects have states and behaviors.
Class – defines the grouping of data and code, the “type” of an object
Instance – a specific allocation of a class
Message – sent to objects to make them act
Method – a “function” that an object knows how to perform
Local Variables − variables defined inside methods, constructors or blocks
Instance Variables – variables within a class but outside any method (a specific piece of data belonging to an object)
Class Variables − variables declared within a class, outside any method, with the static keyword
Encapsulation – keep implementation private and seperate from interface
Polymorphism – different objects, same interface
Inheritance – hierarchical organization, share code, customize or extend behaviors

2.Basic

• If-Else/Switch/Do-While/While/For/Foreach
• Break/Continue
• UserInput
• Array
• Enum

static public int getUserInputIntegerBetween(int min, int max) {
int value = 0;
Scanner scan = new Scanner(System.in);
do {
System.out.printf(“Please enter value [%d-%d]: “, min, max);
try {
value = scan.nextInt();
}
catch (Exception e) {
System.out.printf(“Error! Please re-enter!\n”);
scan.next();
continue;
}
} while (value < min || value > max);
return value;
}

static public double getUserInputDouble() {
double value;
Scanner scan = new Scanner(System.in);
while(true) {
try {
value = scan.nextDouble();
break;
}
catch (Exception e) {
System.out.print(“Error! Please re-enter [double value]: “);
scan.next();
}
}
return value;
}