编辑代码

class Main {
	public static void main(String[] args) {
       String str="My name is Tom,I come from China.";
       System.out.println(str.indexOf("M"));
       System.out.println(str.indexOf("T"));
       System.out.println(str.indexOf("I"));
       System.out.println(str.indexOf("C"));

	
	}
}