• 第一步写个程序查找给定目录下的文件

import java.io.File;
import java.util.Date;
/*
 * @author zhangxiaomin
 * @email 1396729865@qq.com
 */
public class Finder{
    public static void main(String[] args) throws Exception {
        findFile(args[1],args[0]);
    }
    public static void findFile(String path,String fileName) throws Exception{
        File file = null;
        if(!(file = new File(path)).isDirectory()){
            throw new Exception("who is it");
        }
        path = file.getAbsolutePath()+"/";
        String[] dirs = file.list();
        for (int i = 0; i < dirs.length; i++) {
            if(dirs[i].matches(fileName)){
                System.out.println(path + dirs[i]);
            }else if(new File(path+dirs[i]+"/").isDirectory()){
                findFile(new String(path+dirs[i]+"/"), fileName);
            }
        }
    }
}

• 接着自定义一个命令

alias java14="/Users/zhangxiaomin/Library/Java/JavaVirtualMachines/jdk-14.0.1+7/Contents/Home/bin/java"
alias finder="java14 ~/workSpace/demo/Finder.java"

• 开不开心，哈哈哈哈哈哈