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Java Articles
Page 103 of 450
Set the base time zone offset to GMT in Java
In order to set the base time zone to GMT in Java, we use the setRawOffset(int offsetMillis) method. The java.util.TimeZone.setRawOffset(int offsetMillis) method set the base timezone offset to GMT.Declaration − The java.util.TimeZone.setRawOffset(int offsetMillis) method is declared as follows −public abstract void setRawOffset(int offsetMillis)where offsetMillis is the given base time zone offset to GMT.Let us set the base timezone offset to GMT in Java −Exampleimport java.util.*; public class Example { public static void main( String args[] ) { // creating default object of TimeZone TimeZone obj = TimeZone.getDefault(); System.out.println("Default timezone object: ...
Read MoreSubstitute tokens in a String in Java
To substitute tokens in a String in Java, we use the Message Format class. The Message Format class provides a means to produce concatenated messages which are not dependent on the language. The Message Format class extends the Serializable and Cloneable interfaces.Declaration − The java.text.MessageFormat class is declared as follows −public class MessageFormat extends FormatThe MessageFormat.format(pattern, params) method formats the message and fills in the missing parts using the objects in the params array matching up the argument numbers and the array indices.The format method has two arguments, a pattern and an array of arguments. The pattern contains placeholder in ...
Read MoreHow to format message with integer fillers in Java
To format message with integer fillers in Java, we use the MessageFormat class. The MessageFormat class gives us a way to produce concatenated messages which are not dependent on the language. The MessageFormat class extends the Serializable and Cloneable interfaces.Declaration − The java.text.MessageFormat class is declared as follows −public class MessageFormat extends FormatThe MessageFormat.format(pattern, params) method formats the message and fills in the missing parts using the objects in the params array matching up the argument numbers and the array indices.The format method has two arguments, a pattern and an array of arguments. The pattern contains placeholder in {} curly ...
Read MoreFormat a message with date in Java
To format the message with date in Java, we use the MessageFormat class and the Date class. The MessageFormat class gives us a way to produce concatenated messages which are not dependent on the language. The MessageFormat class extends the Serializable and Cloneable interfaces.Declaration - The java.text.MessageFormat class is declared as follows −public class MessageFormat extends FormatThe MessageFormat.format(pattern, params) method formats the message and fills in the missing parts using the objects in the params array matching up the argument numbers and the array indices.The format method has two arguments, a pattern and an array of arguments. The pattern contains placeholder ...
Read MoreEnable Assertions from the command line in Java
By default, assertions are disabled in Java. In order to enable them we use the following command −java -ea Example (or) java -enableassertions ExampleHere, Example is the name of the Java file.Let us see an example for generation of an assertion error by the JVM −Examplepublic class Example { public static void main(String[] args) { int age = 14; assert age >= 18 : "Cannot Vote"; System.out.println("The voter's age is " + age); } }OutputThe voter's age is 14
Read MoreValidate city and state with Java Regular Expressions
In order to match the city and state using regular expression, we use the matches method in Java. The java.lang.String.matches() method returns a boolean value which depends on the matching of the String with the regular expression.Declaration − The java.lang.String.matches() method is declared as follows −Examplepublic class Example { public static void main( String[] args ) { System.out.println(city("Mumbai")); System.out.println(state("Goa")); } // validating the city public static boolean city( String c ) { return c.matches( "([a - zA - Z] + |[a - zA - Z] + \s[a ...
Read MoreValidate the ZIP code with Java Regular expressions
In order to match the ZIP code using regular expression, we use the matches method in Java. The java.lang.String.matches() method returns a boolean value which depends on the matching of the String with the regular expression.Declaration − The java.lang.String.matches() method is declared as follows −public boolean matches(String regex)Let us see a program which validates the ZIP code with Java Regular Expressions −Examplepublic class Example { public static void main( String[] args ) { System.out.println(zipIndia("400709")); System.out.println(zipUS("10060")); } // validate zip public static boolean zipIndia( String z ) { ...
Read MoreFormat floating point with Java MessageFormat
To format message with floating point fillers in Java, we use the MessageFormat class. The MessageFormat class gives us a way to produce concatenated messages which are not dependent on the language. The MessageFormat class extends the Serializable and Cloneable interfaces.Declaration −The java.text.MessageFormat class is declared as follows −public class MessageFormat extends FormatThe MessageFormat.format(pattern, params) method formats the message and fills in the missing parts using the objects in the params array matching up the argument numbers and the array indices.The format method has two arguments, a pattern and an array of arguments. The pattern contains placeholder in {} curly ...
Read MoreReplace '*' with '^' with Java Regular Expressions
To replace *' with '^' using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.Declaration − The java.lang.String.replaceAll() method is declared as follows −public String replaceAll(String regex, String replaced) Let us see a program to replace '*' with '^' using Java Regular Expressions −Examplepublic class Example { public static void main( String args[] ) { String str = new String("H*e*l*l*o"); System.out.println( "Initial String : "+ str); // replacing '*' with ...
Read MoreReplace one string with another string with Java Regular Expressions
To replace one string with another string using Java Regular Expressions, we need to use the replaceAll() method. The replaceAll() method returns a String replacing all the character sequence matching the regular expression and String after replacement.Declaration − The java.lang.String.replaceAll() method is declared as follows −public String replaceAll(String regex, String replaced) Let us see a program to replace one string with another string using Java Regular Expressions −Examplepublic class Example { public static void main( String args[] ) { String str = new String("Good Harry Good"); System.out.println( "Initial String : "+ str); ...
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