Java Programming

Public, Private and Protected "keywards/ access modifiers" are used similarly as they are with variables. Protected variables, methods or class CAN ONLY be used by an inherited class.

An accessor method can be used to get a value from a class without changing the value.

pi, e, phi, 1,2,3,4, etc.

public class Exercise6{

public static void main(String[] args) {

// TODO Auto-generated method stub

System.out.println("Example: " + addBinaryNumbers("100", "111")); // Result = 1011

// Test Cases :

// Valid Equivalence Class

// Since the inputs are valid, there will be no errors

assert (addBinaryNumbers("1", "1").equals("10") ) : "Valid Case 1: Error";

assert (addBinaryNumbers("10", "10").equals("100") ) : "Valid Case 2: Error";

assert (addBinaryNumbers("111", "111").equals("1110") ) : "Valid Case 3: Error";

assert (addBinaryNumbers("1110", "1011").equals("11001") ) : "Valid Case 4: Error";

// Invalid Equivalence Class

// Since the inputs are invalid, there will be errors

assert (addBinaryNumbers("2", "3").equals("101") ) : "Invalid Case 1: Error";

}

public static String addBinaryNumbers(String n1, String n2) {

String result = "";

for(int i = 0; i < n1.length(); i++) {

if ( (n1.charAt(i) != '0') && (n1.charAt(i) != '1') ) {

System.out.println("First number is invalid");

}

}

for(int i = 0; i < n2.length(); i++) {

if ( (n2.charAt(i) != '0') && (n2.charAt(i) != '1') ) {

System.out.println("Second number is invalid");

}

}

int number1 = Integer.parseInt(n1, 2);

int number2 = Integer.parseInt(n2, 2);

int resultNumber = number1 + number2;

result = Integer.toBinaryString(resultNumber);

return result;

}

}

in dynamic list after adding a new element size of the list disturbed so deletion and insertation is necessary to add a new element

LIght Weight Programming means the coding should be small .

Yes, please do. Here is an example:

#include <stdio.h>

int main (void)

{ puts ("Hello, World"); return 0; }

Possible.

void foo (void)

{

int array [10][20];

...

}

• boolean - 1 bit (1/8 bytes) - The actual storage requires for a boolean type is not defined for Java implementations.
• byte - 1 byte
• short - 2 bytes
• int/char - 4 bytes
• long - 8 bytes
• float - 4 bytes
• double - 8 bytes

I don't think there is such a thing as a "default object". The default class, for inheritance purposes, is called "Object".

Return an iterator to the string if it exists, or the container's end iterator if it does not.

Borrowing the isPrime function from another answer of mine. Note that this will result in terrible performance for large arrays of numbers. (You should look into one of the sieve algorithms for this)

// returns 1 if n is prime, 0 otherwise

void isPrime(const int n) {

// We know that if n is composite, then we will find a factor in the range [2,sqrt(n)]

// so we compute the square root only once to limit our number of calculations.

const int sqrt_n = sqrt(n);

// Iterate through possible factors

int i;

for( i = 2; i <= sqrt_n; ++i ) {

// If n is divisible by i (n%i==0) then we have a factor

if(!(n % i)) {

return 0;

}

}

// If we get here, we know n has no factors other than itself and 1

return 1;

}

// returns the sum of all prime numbers in nums

int findPrimeSum(const int numsLength, const int[] nums) {

int sum = 0;

// iterate through nums and add up all the primes

int i;

for(i = 0; i < numsLength; ++i) {

if( isPrime(nums[i] ) {

sum += nums[i];

}

}

return sum;

}

class is template of object and object is instance of a class

unary operators like ++,--

The main method is simply an entry point to your executable code. When you run a Java program, it looks for a main method as the first section of code to execute, which is why all of your programs start there.

A compiler converts a program in one programming language into a program in another programming language. Often the conversion is into a language that can be understood directly by the hardware.

A while loop evaluates the conditional expression at the start of each iteration, whereas a do..while loop evaluates the conditional expression at the end of each iteration. Thus the do..while loop always executes at least one iteration.

/* INPUT: Holy Home

* OUTPUT:H

* ------------ o

* --------------l

* ---------------y

* ---------------- _______________//The '-' are spaces

* ------------------H

* --------------------o

* ---------------------m

* -----------------------e

*

*/

import java.io.*;

class StyleString

{

protected static void main()throws IOException

{

BufferedReader in=new BufferedReader(new InputStreamReader(System.in));

System.out.print("Enter the String: ");

String s=in.readLine();

for(byte i=0;i<s.length();i++)

{

System.out.println();

for(byte j=0;j<i;j++)

System.out.print(' ');

System.out.print(s.charAt(i));

}

}

}

There are many places one can go to learn more about the String Class in the programming language data. Stack Overflow is a great resource for any coding problems and is a good starting point.

It can easily be explained by the fact that Java does not compile to object code. Java compiles to byte code that is suitable for interpretation by the Java virtual machine. C++ compiles to native machine code and therefore does not require interpretation of any kind. As a result, C++ programs run somewhat quicker than equivalent Java programs. However, because Java is interpreted, it is highly portable. Any machine with a Java virtual machine implementation (which is pretty much every device today) can run Java programs built from a single compilation. C++ requires that the code be written specifically for each platform and that the source be compiled separately upon each supported platform.

Class is obviously more important than an object because an object is an instance of a class. A class may contain many objects, all of which are instances of that particular class. Class is also called the object factory because it contains all the statements needed to create an object and its attributes. A class also contains the statements that describe the operations that the created objejct will be able to perform. Therefor a class is more important and obviously come first.

The String class has multiple Constructors. Some of them are:

1. String - new String(String val)

2. Character Array - new String(char[] array)

3. Character Array with index positions - new String(char[] array. int start, int end)

There is nothing like core and advanced java. Actually SUN Corporation released three versions(editions) of Java. 1. Standard edition(J2SE). 2. Enterprise edition(J2EE). 3. Mobile edition(J2ME). Core and Advanced Java are the names given by some people which is wrongly meant. Second Answer These terms aren't an actual part of the Java language or the software typically downloaded to create programs (such as the JRE [Java Runtime Environment], or JDK, or GlassFish, etc). The terms "core Java" and "advanced Java" have relevance only in terms of a series of books. It's the same thing as if a new author published a book and decided to call it "Intermediate Java". It's simply a distinction made by the authors / publishers for the content to be in the specific books. So, the short of it is, they're just references to titles from books.