RandomInt.java RandomInt.java Below is the syntax highlighted version of RandomInt.java from §1.2 Built-in Types of Data. /******************************************************************************
* Compilation: javac RandomInt.java
* Execution: java RandomInt N
*
* Prints a pseudo-random integer between 0 and N-1.
* Illustrate an explicit type conversion (cast) from double to int.
*
* % java RandomInt 6
* Your random integer is: 5
*
* % java RandomInt 6
* Your random integer is: 0
*
* % java RandomInt 1000
* Your random integer is: 129
*
* % java RandomInt 1000
* Your random integer is: 333
*
******************************************************************************/
public class RandomInt {
public static void main(String[] args) {
// a positive integer
int n = Integer.parseInt(args[0]);
// a pseudo-random real between 0.0 and 1.0
double r = Math.random();
// a pseudo-random integer between 0 and n-1
int value = (int) (r * n);
System.out.println(value);
}
}
Copyright © 2000–2017, Robert Sedgewick and Kevin Wayne. Last updated: Fri Oct 20 14:12:12 EDT 2017.
