Java
Table of Contents
1. Programming Foundations
1.1. Hello World
package helloworld;
/**
*
* @author ethanlin
*/
public class HelloWorld {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
System.out.println("Hello Java World");
}
}
2. Java Programming
2.1. Random Number Generator
import java.util.Random;
public class DieSimulator {
public static void main(String[] args){
Random generator = new Random();
System.out.println(generator.nextInt(100)+1);
}
}
2.2. Employ Class
2.2.1. class
public class Employee {
private String name;
private double salary;
public Employee(String employeeName, double currentSalary)
{
this.name = employeeName;
this.salary = currentSalary;
}
public String getName(){
return name;
}
public double getSalary()
{
return salary;
}
public void raiseSalary(double percent)
{
salary += salary*percent/100;
}
}
2.2.2. testing
package employeePackage;
/**
*
* @author ethanlin
*/
public class EmployeeTester {
public static void main(String[] args)
{
Employee harry = new Employee("Harry Hacker",5000);
harry.raiseSalary(10);
System.out.println(harry.getName());
System.out.println("Expected: Harry Hacker");
System.out.printf("%.2f\n",harry.getSalary());
System.out.println("Expected: 55000.00");
}
}
print("Hello World")