2015-09-07 11:44:36 -06:00
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// strings/Immutable.java
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2015-06-15 17:47:35 -07:00
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public class Immutable {
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public static String upcase(String s) {
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return s.toUpperCase();
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}
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public static void main(String[] args) {
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String q = "howdy";
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2015-11-03 12:00:44 -08:00
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System.out.println(q); // howdy
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2015-06-15 17:47:35 -07:00
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String qq = upcase(q);
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2015-11-03 12:00:44 -08:00
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System.out.println(qq); // HOWDY
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System.out.println(q); // howdy
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2015-06-15 17:47:35 -07:00
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}
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2015-09-07 11:44:36 -06:00
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}
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/* Output:
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2015-06-15 17:47:35 -07:00
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howdy
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HOWDY
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howdy
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2015-09-07 11:44:36 -06:00
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*/
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