最长公共字串 记录最长字串的结果

package codes;

public class LongestCommonSubMemo {

	public static void main(String[] args) {
		String res = new LongestCommonSubMemo().lonestCommonSub("tofooodie", "toooday");
		//int max =  new LongestCommonSub().Max(res);
	
		System.out.println(res);
		//System.out.println(new LongestCommonSub().recursiveCommonLongestsSub("tofoodie", "tooday"));
		
	}
	//不带 最长记录的
	public String lonestCommonSub( String str1, String str2){
		String longestSub ="";
		int [][] res = new int [str1.length()][str2.length()];
		//初始化第一行，第一列
		for( int i=0;i<str1.length();i++){
			if(str1.charAt(i) == str2.charAt(0)){
				res[i][0] = 1;
			}
		}
		for( int i=0;i<str2.length();i++){
			if(str1.charAt(0) == str2.charAt(i)){
				res[0][i] = 1;
			}
		}
		
		
		for( int i = 1 ;i< str1.length();i++){
			for(int j = 1; j< str2.length();j++){
				if( str1.charAt(i) == str2.charAt(j)){
					res[i][j] = res[i-1][j-1]+1;
				}
			}
		}
		//print array
		for( int i=0;i< res.length;i++){
			for( int j =0; j< res[0].length ; j++){
				System.out.print(res[i][j]+" ");
			}
			System.out.println();
		}
		// 已经获得res
		int max = 0;
		int row = 0;
		int col = 0;
		for(int i = 0;i<res.length;i++){
			for(int j = 0;j<res[0].length;j++){
			if(res[i][j]> max){
				max = res[i][j];
				row = i;
				col = j;
			}
			
		}
		}	
		
		while( row>0 && col>0){
			longestSub += str1.charAt(row);
			row--;
			col--;
		}
		StringBuffer sb = new StringBuffer(longestSub);
		longestSub = sb.reverse().toString();
		return longestSub;
			
		
	
		
	
	}
	

	
}