第四周作业

package Test;

import java.util.ArrayList;

public class WordFrequency {
    public static String[][] WordFrequency(ArrayList<String> list){        
        String res[] = new String[1000];
        int num[] = new int[1000];
        int i,j;
        int sum = 0;
        boolean state;
        for(i=0;i<list.size();i++) {
            state = false;
            if(i==0) {
                res[sum] = list.get(0);
                num[0]++;
                sum++;
            }
            else {
                for(j=0;j<sum;j++) {
                    if(res[j].equals(list.get(i))) {
                        num[j]++;
                        state = true;
                        break;
                    }
                }
                if(state == false) {
                    res[sum] = list.get(i);
                    num[i]++;
                    sum++;
                }
            }
        }
        String[][] str = new String[sum][2];
        for(i=0;i<sum;i++) {
            str[i][0] = res[i];
            str[i][1] = String.valueOf(num[i]);
        }
        return str;
    }
    
    public static void main(String args[]) {
        ArrayList<String> list =  new ArrayList<String>();
        String res[][];
        list.add("aaa");
        list.add("bbb");
        list.add("cccc");
        list.add("cccc");
        res = WordFrequency(list);
        for(int i=0;i<res.length;i++) {
            for(int j=0;j<res[i].length;j++) {
                System.out.print(res[i][j]+" ");
            }
            System.out.println();
        }
    }
}