RandomNumbers.java

public class RandomNumbers {
	public static void main( String[] args ) {
		int a, b, c, d;
		double r, rps;
		
		rps = Math.random();
		if (rps < 0.3333333 ) { // will be true 1/3 of the time
			System.out.println( "ROCK" );
		}
		else if ( rps < 0.6666667) {
			System.out.println( "PAPER" );
		}
		else {
			System.out.println( "SCISSORS" );
		}
		
		// pick four random integers, each 1-10
		a = 1 + (int)( 10*Math.random() );
		b = 1 + (int)( 10*Math.random() );
		c = 1 + (int)( 10*Math.random() );
		d = 1 + (int)( 10*Math.random() );
		System.out.println( "1-10:\t" + a + "\t" + b + "\t" + c + "\t" + d );
		
		// pick four random integers, each 1-6
		a = 1 + (int)( 6*Math.random() );
		b = 1 + (int)( 6*Math.random() );
		c = 1 + (int)( 6*Math.random() );
		d = 1 + (int)( 6*Math.random() );
		System.out.println( "1-6:\t" + a + "\t" + a + "\t" + a + "\t" + a );
		
		// pick a single random integer, 1-100
		a = 1 + (int)( 100*Math.random() );
		System.out.println( "1-100:\t" + a + "\t" + a + "\t" + a + "\t" + a );
		
		// pick four random integers, each 1-100
		a = 1 + (int)( 100*Math.random() );
		b = 1 + (int)( 100*Math.random() );
		c = 1 + (int)( 100*Math.random() );
		d = 1 + (int)( 100*Math.random() );
		System.out.println( "1-100:\t" + a + "\t" + b + "\t" + c + "\t" + d );
		
		// pick four random integers, each 0-99
		a = 0 + (int)( 100*Math.random() );
		b = 0 + (int)( 100*Math.random() );
		c = (int)(100*Math.random() );
		d = (int)(100*Math.random() );
		System.out.println( "0-99:\t" + a + "\t" + b + "\t" + c + "\t" + d );
		
		// pick four random integers, each 10-20
		a = 10 + (int)( 11*Math.random() );
		b = 10 + (int)( 11*Math.random() );
		c = 10 + (int)( 11*Math.random() );
		d = 10 + (int)( 11*Math.random() );
		System.out.println( "10-20:\t" + a + "\t" + b + "\t" + c + "\t" + d);
		
		// display four random doubles each [0-1)
		System.out.println( "0-1:\t" + Math.random() + "\t" + Math.random() );
		
		r = 10 * Math.random();
		System.out.println( "0-9.99:\t" + r );
		System.out.println( "0-9:\t" + (int)r );
		System.out.println( "1-10:\t" + (1 + (int)r) );
		
		// pick a three random integers, each 1-3
		a = 1 + (int)( 3*Math.random() );
		b = 1 + (int)( 3*Math.random() );
		c = 1 + (int)( 3*Math.random() );
		System.out.println( "1-3:\t" + a + "\t" + b + "\t" + c);
		
		// pick three random integers, each 5-10
		a = 5 + (int)( 5*Math.random() );
		b = 5 + (int)( 5*Math.random() );
		c = 5 + (int)( 5*Math.random() );
		System.out.println( "5-10:\t" + a + "\t" + b + "\t" + c);				
	}
}