编辑代码

public class StringTest {
	public static void main(String args[]){
		String a = "Tom";
		String b = "I am Tom, I am from China.";
		int flag = (b.indexOf(a));
		if(flag >= 0){
			System.out.println("Yes，出现了，在b字符串的"+flag+"个字母处");
		}
		else{
			System.out.println("No,没出现");
		}
	}
}