2 public static void main(String str[]) {
3 String a="hello world\n";
5 System.printInt(a.indexOf('e'));
6 System.printString("\n");
7 System.printInt(a.indexOf("world"));
8 System.printString("\n");
9 System.printString(a.subString(3));
10 System.printString(a.subString(3,6));
11 System.printString("\n");