面试：1.怎么读取src下面的文件2.怎么取出string字符串里面出现最多的字符3.怎么倒叙排列字符

public void get() throws IOException
    {
        //1.
        Properties pr=new Properties();
        String path=this.getClass().getResource("/db.xml").getPath();
        FileInputStream fr=new FileInputStream(path);
        pr.load(fr);
        String url=pr.getProperty("url");
        //2.
        String string="dasdqehjhgradasdasd";
        String max_str="";
        int max_cs=0;
        while(string.length()>0)
        {
            String first=string.substring(0, 1);
            string.replaceAll(first, "");
            int length=string.length();
            if(max_cs<length)
            {
                max_cs=length;
                max_str=first;
            }
        }
        //3.
        String temp="";
        for(int i=string.length();i>=0;i--)
        {
            temp=temp+string.charAt(i-1);
        }
        System.out.println(temp);
    
    }

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