Time in 24-Hour Format Regular Expression Pattern
([01]?[0-9]|2[0-3]):[0-5][0-9]
Description
(#start of group #1
[01]?[0-9]# start with0-9,1-9,00-09,10-19
| # or
2[0-3]# start with20-23
)#end of group #1
:# follow by a semi colon(:)
[0-5][0-9]# follw by0..5and0..9,which means00to59
Code:
package com.codewr.javacore.regular.expression;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
*
* @author codewr
*/
public class Time24HoursValidator {
private static final String TIME24HOURS_PATTERN
= "([01]?[0-9]|2[0-3]):[0-5][0-9]";
public static void main(String[] args) {
Time24HoursValidator time24HoursValidator = new Time24HoursValidator();
//check time validate
boolean isValid = time24HoursValidator.validate("1:00");
System.out.println("time valid is " + isValid);
}
/**
* Validate time with regular expression
*
* @param time time for validation
* @return true valid time, false invalid time
*/
public boolean validate(final String time) {
Pattern pattern = Pattern.compile(TIME24HOURS_PATTERN);
Matcher matcher = pattern.matcher(time);
return matcher.matches();
}
}
Code UnitTest:
Time valid:
1. “01:00”, “02:00”, “13:00”,
2. “1:00”, “2:00”, “13:01”,
3. “23:59″,”15:00”
4. “00:00″,”0:00”
Time invalid:
1. “24:00” – hour is out of range [0-23]
2. “12:60” – minute is out of range [00-59]
3. “0:0” – invalid format for minute, at least 2 digits
4. “13:1” – invalid format for minute, at least 2 digits
5. “101:00” – hour is out of range [0-23]
import com.codewr.javacore.regular.expression.Time24HoursValidator;
import org.testng.Assert;
import org.testng.annotations.*;
/**
*
* @author codewr
*/
public class Time24HoursValidatorTest {
private Time24HoursValidator time24HoursValidator;
@BeforeClass
public void initData() {
time24HoursValidator = new Time24HoursValidator();
}
@DataProvider
public Object[][] ValidTime24HoursProvider() {
return new Object[][]{
new Object[]{"01:00"}, new Object[]{"02:00"},
new Object[]{"13:00"}, new Object[]{"1:00"},
new Object[]{"2:00"}, new Object[]{"13:01"},
new Object[]{"23:59"}, new Object[]{"15:00"},
new Object[]{"00:00"}, new Object[]{"0:00"}
};
}
@DataProvider
public Object[][] InvalidTime24HoursProvider() {
return new Object[][]{
new Object[]{"24:00"}, new Object[]{"12:60"},
new Object[]{"0:0"}, new Object[]{"13:1"},
new Object[]{"101:00"}
};
}
@Test(dataProvider = "ValidTime24HoursProvider")
public void ValidTime24HoursTest(String time) {
boolean valid = time24HoursValidator.validate(time);
System.out.println("Time24Hours is valid : " + time + " , " + valid);
Assert.assertEquals(true, valid);
}
@Test(dataProvider = "InvalidTime24HoursProvider",
dependsOnMethods = "ValidTime24HoursTest")
public void InValidTime24HoursTest(String time) {
boolean valid = time24HoursValidator.validate(time);
System.out.println("Time24Hours is valid : " + time + " , " + valid);
Assert.assertEquals(false, valid);
}
}
Output:
Running Time24HoursValidatorTest
Time24Hours is valid : 01:00 , true
Time24Hours is valid : 02:00 , true
Time24Hours is valid : 13:00 , true
Time24Hours is valid : 1:00 , true
Time24Hours is valid : 2:00 , true
Time24Hours is valid : 13:01 , true
Time24Hours is valid : 23:59 , true
Time24Hours is valid : 15:00 , true
Time24Hours is valid : 00:00 , true
Time24Hours is valid : 0:00 , true
Time24Hours is valid : 24:00 , false
Time24Hours is valid : 12:60 , false
Time24Hours is valid : 0:0 , false
Time24Hours is valid : 13:1 , false
Time24Hours is valid : 101:00 , false
Tests run: 15, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 0.565 sec
Results :
Tests run: 15, Failures: 0, Errors: 0, Skipped: 0
Note: file pom.xml add maven
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.8</version>
<scope>test</scope>
</dependency>