编辑代码

class Main{
    public stattic 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"));      
    }
}