java iterate over a string

1String str = "hello";
2for (char c : str.toCharArray())
3  //process c

1String scientistName = "Isaac Newton";
2 
3for (int i = 0; i < scientistName.length(); i++) {
4    System.out.print(scientistName.charAt(i) + " "); // I s a a c   N e w t o n
5}
6
7//*********************************************************
8// you can cast a string into a char[]
9String str = "strings are not primitive types!";
10 
11
12for (char ch : str.toCharArray()) {
13    	System.out.print(scientistName.charAt(i) + " ");
14    }
15}
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