Java Code to Generate a Random Number

Sample Java Code to Generate a Random Number:

Some times in Projects or Applications, there will be a requirement to generate a Random Number for this we can use the following code.

Random rand = new Random();

// Random integers
int i = rand.nextInt();
// Continually call nextInt() for more random integers

// Random integers ranging from from 0 to n
int n = 10;
i = rand.nextInt(n+1);

// Random bytes
byte[] bytes = new byte[5];
rand.nextBytes(bytes);

// Other primitive types
boolean b = rand.nextBoolean();
long l = rand.nextLong();
float f = rand.nextFloat(); // 0.0 <= f < 1.0
double d = rand.nextDouble(); // 0.0 <= d < 1.0

// Create two random number generators with same seed
long seed = rand.nextLong();
rand = new Random(seed);
Random rand2 = new Random(seed);