HR자바 Java Singleton Pattern

개요

HR자바 Java Singleton Pattern

• https://www.hackerrank.com/challenges/java-singleton/problem
• 참고: 싱글톤

해커랭크 Java

#	문제	비고
HR자바 Advanced e
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54	HR자바 Java Reflection - Attributes
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56	HR자바 Prime Checker
57	HR자바 Java Factory Pattern
58	HR자바 Java Singleton Pattern
59	HR자바 Java Visitor Pattern
60	HR자바 Java Annotations
61	HR자바 Covariant Return Types
62	HR자바 Java Lambda Expressions
63	HR자바 Java MD5
64	HR자바 Java SHA-256

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import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.lang.reflect.*;

class Singleton {
    private Singleton() {}
    private static final Singleton INSTANCE = new Singleton();
    public static Singleton getSingleInstance() {
        return INSTANCE;
    }
    public String str;
}