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  1. Random Number Generator

    Random numbers can be used in Java. Here's a small random number generator and how it works.

    import java.util.Random;
    class Class1{
    	public static void main(String args[]){
    		Random dice = new Random();
    		int number;
     
    		for(int counter = 1; counter <= 10; counter++){
    			number = dice.nextInt(6) + 1;
    			System.out.println(number);
    		}
    	}
    }

    First of all, we need to import the random class. ...
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  2. Math Class Methods

    There are many built in methods we can use to conduct mathematical operations to numbers. Here are some of them.

    class Class1{
    	public static void main(String args[]){
    		//How far number is from zero.
    		System.out.println(Math.abs(-26.7));
    		//Rounds number up.
    		System.out.println(Math.ceil(7.4));
    		//Rounds number down.
    		System.out.println(Math.floor(7.8));
    		//Greater of the two numbers.
    		System.out.println(Math.max(8.6,
    ...
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  3. Do While Loop

    We use the Do While Loop when we want to run a set of instructions before testing to see if a condition is true. The difference between a Do While Loop and a While Loop is that the While Loop tests the condition first and then runs the instructions.

    class Class1{
    	public static void main(String args[]){
    		int counter = 0;
    		do{
    			System.out.println(counter);
    			counter++;
    		}while(counter <= 10);
    	}
    }
    ...
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  4. Compound Interest Calculator

    Compound interest can be calculated with the following formula.

    A = Amount
    P = Principal
    R = Rate
    n = Years

    A=P(1+R)^n

    We can calculate the amount in Java as shown below. We currently know the principal (10,000) and the rate (1%). The years can change depending on how much information we want. In this application, we'll just use 20.

    class Class1{
    	public static void main(String args[]){
    		double amount;
    ...
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  5. For Loops

    The For Loop is probably the most common loop used in any programming language. Here's how it works in Java.

    class Class1{
    	public static void main(String args[]){
    		for(int counter=1; counter<=10; counter++){
    			System.out.println(counter);
    		}
    	}
    }

    The For Loop takes three arguments: where you want it to start, where you want it to end, and how you'd like to increment the counter. Take a look at the below ...
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