34 lines
701 B
Java
34 lines
701 B
Java
// patterns/SingletonPattern3.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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class MyString {
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private String s;
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public MyString(String s) {
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this.s = s;
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}
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public synchronized
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void change(String s) {
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this.s = s;
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}
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@Override public synchronized
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String toString() {
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return s;
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}
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}
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public class SingletonPattern3 {
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public static void main(String[] args) {
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Single<MyString> x =
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new Single<>(new MyString("Hello"));
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System.out.println(x.get());
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x.get().change("World!");
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System.out.println(x.get());
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}
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}
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/* Output:
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Hello
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World!
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*/
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