【个人作业】找水王

import java.util.Random;

public class shuiwang {

    static Random rand = new Random();
    private static int N = rand.nextInt(30)+25;
    private static int[] ID = new int[N];
    
    //随机ID
    public static void randID()
    {
        
        int sw = rand.nextInt(50)+10;
        for(int i=0;i<N;i++)
        {
            ID[i] = rand.nextInt(50)+10;
            System.out.print("ID["+i+"]="+ID[i]+"   ");
            if(ID[i] != sw)
            {
                if(i != N-1)
                {
                    ID[++i] = sw;
                    System.out.print("ID["+i+"]="+ID[i]+"   ");
                }
            }
            
        }
        System.out.println();
    }
    
    public static void findsw()
    {
        int t=0,m=0;
        //count[][0]为ID，count[][1]为次数
        int[][] count = new int[N][2];
        for(int i=0;i<N;i++)
        {
            for(int j=0;(j<i)&&(t==0);j++)
            {
                if(ID[i] == count[j][0])
                {
                    count[j][1]++;
                    t=1;
                }
            }
            if(t==0)
            {
                count[m][0] = ID[i];
                count[m++][1]++;
            }else
            {
                t=0;
            }
        }
        for(int i=0;i<N;i++)
        {
            if(count[t][1] < count[i][1])
            {
                t = i;
                //System.out.println("t = "+t);
            }
            //System.out.print("count["+t+"][1] = "+count[t][1]+", 	"+"count["+t+"][0] = "+count[t][0]+", 	");
            //System.out.println("count["+i+"][1] = "+count[i][1]+"count["+i+"][0] = "+count[i][0]+", 	");
        }
        System.out.println("水王："+count[t][0]);
    }
    
    public static void findsw2()
    {
        int c=0,t=0;
        int[] count = new int[50];
        for(int i=0;i<N;i++)
        {
            count[(ID[i]-10)]++;
            if(count[(ID[i]-10)] > c)
            {
                c = count[(ID[i]-10)];
                t = ID[i];
            }
            if(c > (N/2) )
                break;
        }
        System.out.println("水王："+t);
    }
    
    public static String removeCharAt(int pos,String s) 
    {
        return s.substring(0, pos) + s.substring(pos + 1);
    }
    
    public static void findsw3()
    {
        int j=0;
        String s = null;
        for(int i=0;i < N;i++)
        {
            if(i < N-2)
            {
                s += ID[i] + ID[i+1];
                if(ID[i] != ID[i+1])
                {
                    removeCharAt(j,s);
                    removeCharAt(j,s);
                    i = i+2;
                }
                else
                {
                    removeCharAt(j++,s);
                }
            }
            if(i == N-1)
            {
                s += ID[i] + ID[i+1];
                if(ID[i] != ID[i+1])
                {
                    removeCharAt(j,s);
                    removeCharAt(j,s);
                }
                else
                {
                    removeCharAt(j++,s);
                }
            }
        }
        System.out.println(s);
    }
    
    
    
    public static void main(String [] args)
    {
        randID();
        findsw();
        findsw2();
    }
    
}