Java tokens are smallest elements of a program which are identified by the compiler. Tokens in java include identifiers, keywords, literals, operators and, separators.

Boolean literals represent only two values true or false. And in Java the value of 1 is assumed as true and the value of 0 is assumed as false. Example Live Demo public class Test{ public static void main(String args[]) throws Exception{ boolean bool1 = true; boolean bool2 = false; boolean bool = (25==(100/4)); System.out.println(bool1); System.out.println(bool2); System.out.println(bool); } } Output true false true

Character literals represents alphabets (both cases), numbers (0 to 9), special characters (@, ?, & etc.) and escape sequences like , \b etc. Whereas, the String literal represents objects of String class. Example Live Demo public class LiteralsExample { public static void main(String args[]){ char ch = 'H'; String str = "Hello"; System.out.println("Value of character: "+ch); System.out.println("Value of string: "+str); } } Output Value of character: H Value of string: Hello

Integer literals represent fixed integer values like 900, 12, 400, -222 etc. (with in the integer range). Whereas, floating point literals represents fractional values i.e. numbers with decimal values like 25.53, 45.66, 58.66 etc. while writing these literals we should use the notation f or F as 25.53. Example Live Demo public class StringExample { public static void main(String args[]){ int num1 = 100; float num2 = 30.0f; System.out.println("Value of integer:"+num1); System.out.println("Value of integer:"+num2); } } Output Value of integer:100 Value of integer:30.0

A literal is a source code representation of a fixed value. They are represented directly in the code without any computation. Literals can be assigned to any primitive type variable. Example byte a = 68; char a = 'A' byte, int, long, and short can be expressed in decimal(base 10), hexadecimal(base 16) or octal(base 8) number systems as well. Prefix 0 is used to indicate octal, and prefix 0x indicates hexadecimal when using these number systems for literals. For example − int decimal = 100; int octal = 0144; int hexa = 0x64; String ... Read More

Data types are those which specify the type of data represented by the variable and literal is the that is stored in to the variable. A literal is a source code representation of a fixed value. They are represented directly in the code without any computation. Literals can be assigned to any primitive type variable. Example byte a = 68; char a = 'A'

Reference datatypes in java are those which contains reference/address of dynamically created objects. These are not predefined like primitive data types. Following are the reference types in Java. class types − This reference type points to an object of a class. array types − This reference type points to an array. interface types − This reference type points to an object of a class which implements an interface. Once we create a variable of these types (i.e. when we create an array or object, class or interface). These variables only store the address of these values. Default ... Read More

Reference datatypes in java are those which contains reference/address of dynamically created objects. These are not predefined like primitive data types. Following are the reference types in Java. class types − This reference type points to an object of a class. array types − This reference type points to an array. interface types − This reference type points to an object of a class which implements an interface. Once we create a variable of these types (i.e. when we create an array or object, class or interface). These variables only store the address of these values. Default ... Read More

Whenever we try to sort elements with null values using the sort method it throws an exception.The sort() method of the Arrays class also accepts a Comparator along with the array. Using comparator, you need to specify the order in which the elements need to be sorted.Using this method push all the null elements to last and sort the elements −Example Live Demoimport java.util.Arrays; import java.util.Comparator; public class ArrayWithNullsInOrder { public static void main(String args[]) { String[] myArray = {"JavaFX", null, "OpenCV", null, "Hadoop", null}; Arrays.sort(myArray, Comparator.nullsLast(String.CASE_INSENSITIVE_ORDER)); System.out.println(Arrays.toString(myArray)); } }Output[Hadoop, JavaFX, OpenCV, null, null, null]Read More

To sort a String array in Java, you need to compare each element of the array to all the remaining elements, if the result is greater than 0, swap them.One solution to do so you need to use two loops (nested) where the inner loop starts with i+1 (where i is the variable of outer loop) to avoid repetitions in comparison.ExampleLive Demoimport java.util.Arrays; public class StringArrayInOrder {    public static void main(String args[]) {       String[] myArray = {"JavaFX", "HBase", "OpenCV", "Java", "Hadoop", "Neo4j"};       int size = myArray.length;       for(int i = 0; i