Generating 10 digits unique random number in java

Question

I am trying with below code to generate 10 digits unique random number. As per my req i have to create around 5000 unique numbers(ids). This is not working as expected. It a

Answer 1

Hi you can use the following method to generate 10 digit random number

private static int getRndNumber() {
    Random random=new Random();
    int randomNumber=0;
    boolean loop=true;
    while(loop) {
        randomNumber=random.nextInt();
        if(Integer.toString(randomNumber).length()==10 && !Integer.toString(randomNumber).startsWith("-")) {
            loop=false;
        }
        }
    return randomNumber;
}