Java在0-100的范围内生成随机整数

package MR_9_12;

import java.io.*;
import java.util.Random;;

public class MakeDataTest {
    
    
	public static void main(String[] args){
    
    
		String filepath = "src\\data";
		filepath +="\\1.txt";
		System.out.println(filepath);
		try {
    
    
			File file = new File(filepath);
			if(!file.exists()) 
			{
    
    	
				file.createNewFile();
				System.out.println("data.txt创建完成");
			}
			FileWriter fw = new FileWriter(file);
			BufferedWriter bw = new BufferedWriter(fw);
			//产生随机数据，写入文件
			Random random = new Random();
			for(int i=0;i<5000000;i++) 
			{
    
    
				int randint = (int)Math.floor((random.nextDouble()*100.0));
				if(i==0)
					bw.write(String.valueOf(randint));   //写入一个随机数
				else
					bw.write(","+String.valueOf(randint));
				//bw.newline() //新的一行
			}
			bw.close();
			fw.close();
		} catch (Exception e) {
    
    
			e.printStackTrace();
		}
			// TODO: handle exception
	}
}