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#502 Replaced usages of System.out with logger.

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This commit is contained in:
daniel-bryla
2016-10-23 19:59:03 +02:00
parent 4ca205c03c
commit 0438811489
154 changed files with 1155 additions and 792 deletions
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25
singleton/src/main/java/com/iluwatar/singleton/App.java
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@@ -22,6 +22,9 @@
*/
package com.iluwatar.singleton;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Singleton pattern ensures that the class can have only one existing instance per Java classloader
* instance and provides global access to it.
@@ -60,6 +63,8 @@ package com.iluwatar.singleton;
*/
public class App {
private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
/**
* Program entry point.
*
@@ -70,35 +75,35 @@ public class App {
// eagerly initialized singleton
IvoryTower ivoryTower1 = IvoryTower.getInstance();
IvoryTower ivoryTower2 = IvoryTower.getInstance();
System.out.println("ivoryTower1=" + ivoryTower1);
System.out.println("ivoryTower2=" + ivoryTower2);
LOGGER.info("ivoryTower1={}", ivoryTower1);
LOGGER.info("ivoryTower2={}", ivoryTower2);
// lazily initialized singleton
ThreadSafeLazyLoadedIvoryTower threadSafeIvoryTower1 =
ThreadSafeLazyLoadedIvoryTower.getInstance();
ThreadSafeLazyLoadedIvoryTower threadSafeIvoryTower2 =
ThreadSafeLazyLoadedIvoryTower.getInstance();
System.out.println("threadSafeIvoryTower1=" + threadSafeIvoryTower1);
System.out.println("threadSafeIvoryTower2=" + threadSafeIvoryTower2);
LOGGER.info("threadSafeIvoryTower1={}", threadSafeIvoryTower1);
LOGGER.info("threadSafeIvoryTower2={}", threadSafeIvoryTower2);
// enum singleton
EnumIvoryTower enumIvoryTower1 = EnumIvoryTower.INSTANCE;
EnumIvoryTower enumIvoryTower2 = EnumIvoryTower.INSTANCE;
System.out.println("enumIvoryTower1=" + enumIvoryTower1);
System.out.println("enumIvoryTower2=" + enumIvoryTower2);
LOGGER.info("enumIvoryTower1={}", enumIvoryTower1);
LOGGER.info("enumIvoryTower2={}", enumIvoryTower2);
// double checked locking
ThreadSafeDoubleCheckLocking dcl1 = ThreadSafeDoubleCheckLocking.getInstance();
System.out.println(dcl1);
LOGGER.info(dcl1.toString());
ThreadSafeDoubleCheckLocking dcl2 = ThreadSafeDoubleCheckLocking.getInstance();
System.out.println(dcl2);
LOGGER.info(dcl2.toString());
// initialize on demand holder idiom
InitializingOnDemandHolderIdiom demandHolderIdiom =
InitializingOnDemandHolderIdiom.getInstance();
System.out.println(demandHolderIdiom);
LOGGER.info(demandHolderIdiom.toString());
InitializingOnDemandHolderIdiom demandHolderIdiom2 =
InitializingOnDemandHolderIdiom.getInstance();
System.out.println(demandHolderIdiom2);
LOGGER.info(demandHolderIdiom2.toString());
}
}