随机字母

随机生成小写字母，并写入文件中

package work4;
import java.io.*;
import  java.util.Random;
public class main {
    public static void main(String []args){
        File file = new File("./src/work4/test.txt");
        if(!file.exists()){
            try {
                file.createNewFile();
                System.out.println("创建成功");
            }
            catch (IOException exp){}
        }
        try{
            FileWriter w = new FileWriter(file);   //创建一个对象
            for (int i = 0; i < 6; i++) {
                for (int j = 0; j < 20; j++){    //循环输入20个字母
                    char x = getLetter();
                    w.write(x);
                }
                w.write("\n");  //换行
        }
            w.close();
        }
        catch (IOException exp){}
    }
    public static char getLetter(){
        Random x = new Random();
        char someone = (char)(x.nextInt(122-97+1)+97);  //随机返回一个小写字母
        return someone;
    }
}