package method;import javax.swing.*;//随机数public class RandomIntegers ...{ public static void main(String args[])...{ int value; String output=""; for(int i=1;i<=20;i++)...{ value = 1 + (int) (Math.random() * 6); output += value + " "; if(i % 5 == 0) output +=" "; } JOptionPane.showMessageDialog(null, output,"20Random Numbers from 1 to 6",JOptionPane.INFORMATION_MESSAGE); }}