diff options
Diffstat (limited to 'Year_2/SE/design_patterns')
-rw-r--r-- | Year_2/SE/design_patterns/singleton/Logs.java | 10 | ||||
-rw-r--r-- | Year_2/SE/design_patterns/singleton/Main.java | 12 |
2 files changed, 22 insertions, 0 deletions
diff --git a/Year_2/SE/design_patterns/singleton/Logs.java b/Year_2/SE/design_patterns/singleton/Logs.java new file mode 100644 index 0000000..85deef9 --- /dev/null +++ b/Year_2/SE/design_patterns/singleton/Logs.java @@ -0,0 +1,10 @@ +public class Logs { + private static Logs log; + + private Logs(){} + + public static Logs getInstanceLogs() { + if(log == null) log = new Logs(); + return log; + } +} diff --git a/Year_2/SE/design_patterns/singleton/Main.java b/Year_2/SE/design_patterns/singleton/Main.java new file mode 100644 index 0000000..5d05cea --- /dev/null +++ b/Year_2/SE/design_patterns/singleton/Main.java @@ -0,0 +1,12 @@ +public class Main { + public static void main(String[] args) { + Logs l = Logs.getInstanceLogs(); + Logs l2 = Logs.getInstanceLogs(); + + // Prints "true" + System.out.println(l == l2); + + // Error, because the constructor is private + // Logs l3 = new Logs(); + } +} |