java随机两位数 java随机两位小数

package com.thesis.Method1;

import java.text.DecimalFormat;


public class MainSolution {


    private static final int NUM = 5;
    public static void main(String[] args){

        for(float f :genProp()){
            System.out.println(f );
        }
    }


    public static float[] genProp(){
        //产生概率随机数，且让和为1
        float[] prop =new float[NUM];
        int[] randInt =new int[NUM];
        int sum=0;
        for(int i=0;i<NUM;i++){
            randInt[i]=1+(int)(Math.random()*10);
            sum+=randInt[i];
        }
                DecimalFormat dF=new DecimalFormat(".00");
        float sumprop=0;
        for(int i=0;i<NUM;i++){
            prop[i]= Float.parseFloat(dF.format(1.0*randInt[i]/sum));
            sumprop+=prop[i];
        }
        sumprop=Float.parseFloat(dF.format(sumprop));
        if(sumprop<1){
            prop[NUM-1]+=1-sumprop;
        }
        else {
            prop[NUM - 1] -= sumprop - 1;
        }
            return prop;

}

}