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Articles by Venkata Sai
Page 3 of 5
Java program to print a given matrix in Spiral Form.
Following is a Java program to print the spiral form of a given matrix.Examplepublic class PrintMatrixInSpiralForm { public static void main(String args[]){ int a[][]={{1,2,3},{4,5,6},{7,8,9}}; int w = 0; int x = a.length-1; int y = 0; int z = a[0].length-1; while(w
Read MoreProgram to print a matrix in Diagonal Pattern.
Following is the Java program to print diagonal pattern of a given matrix.Examplepublic class DiagonalMatrix { public static void main(String args[]){ int a[][]={{1,2,3},{4,5,6},{7,8,9}}; int rows = a.length; int columns = a[0].length; for (int i = 0; i < rows; i++) { for (int r = i, c = 0; r >= 0 && c < columns; r--, c++){ System.out.print(a[r][c] + " "); } System.out.println(); } for (int i = 1; i < columns; i++) { for (int r = rows-1, c = i; r >= 0 && c < columns; r--, c++) { System.out.print(a[r][c] + " "); } System.out.println(); } } }Output1 4 2 7 5 3 8 6 9
Read MoreProgram for converting Alternate characters of a string to Upper Case.
You can convert a character to upper case using the toUpperCase() method of the character class.ExampleFollowing program converts alternate characters of a string to Upper Case.import java.util.Scanner; public class UpperCase { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.println("Enter a string :"); String str = sc.nextLine(); str = str.toLowerCase(); char[] ch = str.toCharArray(); for(int i=0; i
Read MoreWrite a program to convert an array to String in Java?
The Arrays class of the java.util package provides a method named toString() this method accepts an array value (of any type) and returns a String.ExampleFollowing Java program accepts various arrays from the user, converts them into String values and prints the results.import java.util.Arrays; import java.util.Scanner; public class ObjectArrayToStringArray { public static void main(String args[]){ Scanner sc = new Scanner(System.in); //Integer array to String System.out.println("Enter 5 integer values: "); int intArray[] = new int[5]; for(int i=0; i
Read MoreJava program for Multiplication of Array elements
To find the product of elements of an array.create an empty variable. (product)Initialize it with 1.In a loop traverse through each element (or get each element from user) multiply each element to product.Print the product.Exampleimport java.util.Arrays; import java.util.Scanner; public class ProductOfArrayOfElements { public static void main(String args[]){ System.out.println("Enter the required size of the array :: "); Scanner s = new Scanner(System.in); int size = s.nextInt(); int myArray[] = new int [size]; int product = 1; System.out.println("Enter the elements of the array one by one "); for(int i=0; i
Read MoreCan we serialize static variables in Java?
In Java, serialization is a concept using which we can write the state of an object into a byte stream so that we can transfer it over the network (using technologies like JPA and RMI).But, static variables belong to class therefore, you cannot serialize static variables in Java. Still if you try to do so, the program gets compiled successfully but it raises an exception at the time of execution.In the following java program, the class Student has a static variable and we are trying to serialize and desterilize its object in the another class named ExampleSerialize.Exampleimport java.io.FileInputStream; import java.io.FileOutputStream; ...
Read MoreExplain how to remove Leading Zeroes from a String in Java
Whenever you read an integer value into a String, you can remove leading zeroes of it using StringBuffer class, using regular expressions or, by converting the given String to character array.Converting to character arrayFollowing Java program reads an integer value from the user into a String and removes the leading zeroes from it by converting the given String into Character array.Exampleimport java.util.Scanner; public class LeadingZeroes { public static String removeLeadingZeroes(String num){ int i=0; char charArray[] = num.toCharArray(); for( ; i
Read MoreCan we cast reference variables in Java?
Java provides various datatypes to store various data values. It provides 7 primitive datatypes (stores single values) namely, boolean, byte, char, short, int, long, float, double and, reference datatypes (arrays and objects).Casting in JavaConverting one primitive data type into another is known as type casting.Exampleimport java.util.Scanner; public class TypeCastingExample { public static void main(String args[]){ Scanner sc = new Scanner(System.in); System.out.println("Enter an integer value: "); int i = sc.nextInt(); long num = i; System.out.println("Value of the given integer: "+num); } }OutputEnter an integer ...
Read MoreHow to iterate the values in an enum in Java?
Enumeration (enum) in Java is a datatype which stores a set of constant values. You can use enumerations to store fixed values such as days in a week, months in a year etc.enum Days { SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY }You can iterate the contents of an enumeration using for loop, using forEach loop and, using java.util.stream.Using for loopYou can retrieve the contents of an enum using the values() method. This method returns an array containing all the values. Once you obtain the array you can iterate it using the for loop.ExampleFollowing java program iterates ...
Read MoreWhat are the rules to be followed while using varargs in java?
Since JSE1.5 you can pass a variable number of values as argument to a method. These arguments are known as var args and they are represented by three dots (…)Syntaxpublic myMethod(int ... a) { // method body }Rules to follow while using varargs in JavaWe can have only one variable argument per method. If you try to use more than one variable arguments a compile time error is generated.ExampleIn the following Java example we are trying to accepts two varargs from the method sample().public class VarargsExample{ void demoMethod(int... ages), String... names) { ...
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