找子字符串(java版)

在一個長字符串b裏找子字符串，看是否等於短字符串a

package findChar;

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class findSonString {

	public static String  findTheSame(String a, String b) {
		int i,j,k;
		int temp=0;
		for(j=0;j<b.length()&&temp!=a.length();j++){
			if(b.charAt(j)==a.charAt(0)){
				temp=0;
				k=j;
				for(i=0;i<b.length()-j&&i<a.length();i++,k++){
					if(a.charAt(i)==b.charAt(k))temp++;
				}
			}
		}
		if(temp==a.length())return "Match OK";
		else return "No match";
	}
	public static void main(String args[]) {
		System.out.print("請輸入字符串a:");
		Scanner inputA=new Scanner(System.in);
		String a=inputA.next();
		System.out.print("請輸入字符串b:");
		Scanner inputB=new Scanner(System.in);
		String b=inputB.next();
		String  key = findSonString.findTheSame(a,b);
		System.out.println("匹配結果:"+key);

        int count=0;
        Matcher m=Pattern.compile(a).matcher(b);       
        while(m.find()){
            count++;
            }
        System.out.println("有多少個子字符:"+count);
	}
}