23 lines
529 B
Java
23 lines
529 B
Java
// strings/Immutable.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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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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System.out.println(q); // howdy
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String qq = upcase(q);
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System.out.println(qq); // HOWDY
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System.out.println(q); // howdy
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}
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}
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/* Output:
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howdy
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HOWDY
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howdy
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*/
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