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simplified the leap year check logic

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macroscopic64 2019-02-14 08:36:11 +05:30
parent 439a37301b
commit 7e843727b9
3 changed files with 20 additions and 12 deletions
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7
core-java-9/src/main/java/com/baeldung/multireleaseapp/App.java
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@ -1,11 +1,16 @@
package com.baeldung.multireleaseapp; package com.baeldung.multireleaseapp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class App { public class App {
private static final Logger logger = LoggerFactory.getLogger(App.class);
public static void main(String[] args) throws Exception { public static void main(String[] args) throws Exception {
String dateToCheck = args[0]; String dateToCheck = args[0];
boolean isLeapYear = DateHelper.checkIfLeapYear(dateToCheck); boolean isLeapYear = DateHelper.checkIfLeapYear(dateToCheck);
System.out.println("Date given " + dateToCheck + " is leap year: " + isLeapYear); logger.info("Date given " + dateToCheck + " is leap year: " + isLeapYear);
} }
} }

18
core-java-9/src/main/java/com/baeldung/multireleaseapp/DateHelper.java
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@ -2,23 +2,21 @@ package com.baeldung.multireleaseapp;
import java.text.SimpleDateFormat; import java.text.SimpleDateFormat;
import java.util.Calendar; import java.util.Calendar;
import java.util.GregorianCalendar;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DateHelper { public class DateHelper {
private static final Logger logger = LoggerFactory.getLogger(DateHelper.class);
public static boolean checkIfLeapYear(String dateStr) throws Exception { public static boolean checkIfLeapYear(String dateStr) throws Exception {
System.out.println("Checking for leap year using Java 1 calendar API "); logger.info("Checking for leap year using Java 1 calendar API");
boolean isLeapYear = false;
Calendar cal = Calendar.getInstance(); Calendar cal = Calendar.getInstance();
cal.setTime(new SimpleDateFormat("yyyy-MM-dd").parse(dateStr)); cal.setTime(new SimpleDateFormat("yyyy-MM-dd").parse(dateStr));
int year = cal.get(Calendar.YEAR); int year = cal.get(Calendar.YEAR);
if (year % 4 == 0) { return (new GregorianCalendar()).isLeapYear(year);
if (year % 100 == 0) {
isLeapYear = (year % 400 == 0) ? true : false;
} else {
isLeapYear = true;
}
}
return isLeapYear;
} }
} }

7
core-java-9/src/main/java9/com/baeldung/multireleaseapp/DateHelper.java
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@ -2,10 +2,15 @@ package com.baeldung.multireleaseapp;
import java.time.LocalDate; import java.time.LocalDate;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DateHelper { public class DateHelper {
private static final Logger logger = LoggerFactory.getLogger(DateHelper.class);
public static boolean checkIfLeapYear(String dateStr) throws Exception { public static boolean checkIfLeapYear(String dateStr) throws Exception {
System.out.println("Checking for leap year using Java 9 Date Api"); logger.info("Checking for leap year using Java 9 Date Api");
return LocalDate.parse(dateStr) return LocalDate.parse(dateStr)
.isLeapYear(); .isLeapYear();
} }