How to generate a certain amount of random numbers within a range in Java?-CodePudding

I'm trying to make a small program that allows you to generate a certain amount of numbers within a range, but it does not work as expected.

For example, if I ask the program to generate 3 random numbers between 5 and 10 it gives me 5 random numbers between 0 and 5.

 private void jFillActionPerformed(java.awt.event.ActionEvent evt) {                                      
    
    int intInput1;
    int intInput2;
    int intInput3;
    int i;
    int RandomNumber;
    
    intInput1 = Integer.parseInt(txtInput1.getText());
    intInput2 = Integer.parseInt(txtInput2.getText());
    intInput3 = Integer.parseInt(txtInput3.getText());
    
    int ListSize = (intInput3)   1;
  
    Random rnd = new Random();
    for (i = 0; i <= ListSize; i  )
    {
        RandomNumber = rnd.nextInt((intInput2 - intInput1)   1);
        fill.addElement(RandomNumber);
        lstNumbers.setModel(fill);
    }

CodePudding user response：

Simply always add 5 (or more specifically - intInput1 in your case as it seems it's lower range value) to generated numbers so it will be in the range you need (0 5=5, 5 5=10 so it will be in range 5,10)

CodePudding user response：

Here an IntStream you can later than use limit to set the amount of numbers you want.

public static IntStream numbersBetween(int from, int to){
return new Random().ints().map(e -> Math.abs(e % ((to 1) - from))   from);
}