1--6之间随机数数概论！

package method;
import javax.swing.*;

//每次生成的数字都不相同
public class RollDie ...{
    public static void main(String args[])...{
        int frequency1=0;
        int frequency2=0;
        int frequency3=0;
        int frequency4=0;
        int frequency5=0;
        int frequency6=0;
        int face;
        
        for (int i=1;i<=6000;i++)...{
            face = 1 + (int)(Math.random()*6);
            switch(face)...{
            case 1:
                ++frequency1;
                break;
            case 2:
                ++frequency2;
                break;
            case 3:
                ++frequency3;
                break;
            case 4:
                ++frequency4;
                break;
            case 5:
                ++frequency5;
                break;
            case 6:
                ++frequency6;
                break;
            }
        }
        JTextArea outputArea = new JTextArea();
        outputArea.setText("Face Frequency"+" 1 "+frequency1+
                        " 2 "+frequency2+" 3 "+frequency3+
                        " 4 "+frequency4+" 5 "+frequency5+
                        " 6 "+frequency6);
        
        JOptionPane.showMessageDialog(null, outputArea,"Rolling a Die 6000 Times",JOptionPane.INFORMATION_MESSAGE);
        System.exit(0);
    }
}

 1---6之间每个整数都应该出现1000次左右！！

face = 1 + ( int ) ( Math.random() * 6 );

数 =  一位值 + ( Math.random() * 缩放因子 );