ProgrammingKnowledge: 2014

Wednesday, December 31, 2014

Java Tutorial For Beginners 24 - The final keyword in Java

package lesson1;
/*
Final keyword has a numerous way to use:

A final class cannot be subclassed.
A final method cannot be overridden by subclasses
A final variable can only be initialized once
*/
public class Hello {
   public final int number ;
   
   Hello () {
    number = 10;
   }
   
}

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Java Tutorial For Beginners 23 - Public, Private, Protected and this (Ja...

package lesson1;
/*Access Levels
Modifier Class Package Subclass World
public          Y      Y  Y           Y
protected   Y     Y         Y               N
no modifier   Y      Y   N           N
private           Y  N   N           N
*/
public class Student {
 private String name;
 private int age;
 
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }

}



public class MyClass {

 public static void main(String[] args) {
  Student stu = new Student();
  stu.setName("mark");
  System.out.println(stu.getName());
 }
    
}

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Tuesday, December 30, 2014

Java Tutorial For Beginners 20 - Method Overloading in Java

package lesson1;
public class MyClass {

 public static void main(String[] args) {
       System.out.println(Add(1,36));
       System.out.println(Add(5.656,40.66));
       System.out.println(Add("hello"," world"));
 }
    
 public static int Add (int a ,int b){
  return (a+b);
 }
 
 public static double Add (double a ,double b){
  return (a+b);
 }
 
 public static String Add (String a ,String b){
  return (a+b);
 }
}

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Java Tutorial For Beginners 18 - Classes and Objects in Java

package lesson1;

public class Student {
 int id;
 String name;
 int age;

 public int getId() {
  return id;
 }
 public void setId(int id) {
  this.id = id;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
}

public class MyClass {

 public static void main(String[] args) {
  Student mark = new Student();//mark -> object or instance
  
  mark.setId(1);
  mark.setName("Mark");
  mark.setAge(15);
  
  Student tom = new Student();//Tom -> object or instance
  
  tom.setId(1);
  tom.setName("Tom"); 
  tom.setAge(14);
  
  System.out.println(mark.getName() + " is "+ mark.getAge() + " years old");
  System.out.println(tom.getName() + " is "+ tom.getAge() + " years old");
 }

}

Java Tutorial For Beginners 17 - Parameter passing and Returning a Value...

package lesson1;
public class MyClass {

 public static void main(String[] args) {
  
  int sum = Add(100,201,211);
  int result =sum * 15;
  System.out.println(result);
 }
 
 public static void sayHello(String name) {
  System.out.println("Hello " + name);
 }
 
 public static int Add (int a,int b,int c)
 {
  //System.out.println(a+ b +c);
  return (a +b+c);
 }

}

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Monday, December 29, 2014

Java Tutorial For Beginners 15 - Java String

package lesson1;
public class MyClass {

 public static void main(String[] args) {
      String myString = "Hello e World e";
      int myStringLegth = myString.length();
      String myStringinCase = myString.toUpperCase();
      
      System.out.println(myString.indexOf('o'));
 }

}

Java Tutorial For Beginners 14 - The for Statement in Java (for loops)

package lesson1;
public class MyClass {

 public static void main(String[] args) {
  int[] myintarray = {100,31,26,48,52};
  
  for (int index=0 ; index < 5 ; index++)
  {
   System.out.println(myintarray[index]);
  }
  
  for (int element : myintarray)
  {
   System.out.println(element);
  }
 }

}

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Java Tutorial For Beginners 13 - Arrays in Java

package lesson1;
public class MyClass {

 public static void main(String[] args) {
  int[] myintarray = {100,31,26,48,52};
  /*
  int[] myIntArray = new int[3];
  int[] myIntArray = {1,2,3};
  int[] myIntArray = new int[]{1,2,3};
  */
  int index=0;
  while(index < 5) {
  System.out.println(myintarray[index]);
  index++;
  }
 }

}

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Java Tutorial For Beginners 13 - Arrays in Java

package lesson1;
public class MyClass {

 public static void main(String[] args) {
  int[] myintarray = {100,31,26,48,52};
  /*
  int[] myIntArray = new int[3];
  int[] myIntArray = {1,2,3};
  int[] myIntArray = new int[]{1,2,3};
  */
  int index=0;
  while(index < 5) {
  System.out.println(myintarray[index]);
  index++;
  }
 }

}

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Java Tutorial For Beginners 12 - The do-while Statements (do-while Loops)

package lesson1;
public class MyClass {

 public static void main(String[] args) {
  int a = 0;

  while (a <= -1)
  {
   System.out.println(a); 
   a++;
  }

  System.out.println("------------------------------");
  int b = 0;
  do {
   System.out.println(b); 
   b++;
  } while (b <= -1);


 }

}

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Sunday, December 28, 2014

Java Tutorial For Beginners 11 - The while Statements

package lesson1;

public class MyClass {

 public static void main(String[] args) {
      int a = 10;
      
      while (a >= 1)
      {
      System.out.println(a); 
      a--;
      }
        
    }

}

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Learning Java in simple and easy steps : A beginner's tutorial containing complete knowledge of Java Syntax Object Oriented Language, Methods, Overriding, Inheritance, Polymorphism, Interfaces, Packages, Collections, Networking, Multithreading, Generics, Multimedia, Serialization, GUI

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Java Tutorial For Beginners 10 - switch Statement in Java

package lesson1;

public class MyClass {

 public static void main(String[] args) {
        int score = 80;
        //  byte, short, int, or char.
        switch (score)
        {
        case 100 : 
        case 95 : 
        case 90 :
         System.out.println("Very good");
         break;
        case 80 :
        case 60 :
         System.out.println("Good");
         break;
        case 40 :
         System.out.println("OK");
         break;
        default :
         System.out.println("The grades are not defined");
         break;
        }
        
    }

}

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Learning Java in simple and easy steps : A beginner's tutorial containing complete knowledge of Java Syntax Object Oriented Language, Methods, Overriding, Inheritance, Polymorphism, Interfaces, Packages, Collections, Networking, Multithreading, Generics, Multimedia, Serialization, GUI

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Sunday, December 21, 2014

Java Tutorial For Beginners 8 - IF ... ELSE Statements and Relational O...

package lesson1;

public class MyClass {
 /*
 == is equal to
 != is not equal to
 > is greater than
 < is less than
 >= is greater than or equal to
 <= is less than or equal to
 */
 public static void main(String[] args) {
        int x = 10;
        
        if (x <= 20) {
         System.out.println("yes x == 10");
        } 
        else {
         System.out.println("no x != 10");
        }
    }

}

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Saturday, December 20, 2014

Java Tutorial For Beginners 5 - Getting User Input using Java

package lesson1;

import java.util.Scanner;
public class MyClass {

 public static void main(String[] args) {
   Scanner scan = new Scanner (System.in);
      System.out.println("Enter some String");
      
      String user_input_string = scan.nextLine();
      long user_input_Long =scan.nextLong();
      
      System.out.println("The entered String is");
      System.out.print(user_input_string);  
      
      System.out.println("The entered String is");
      System.out.print(user_input_Long);    
    }

}

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Thursday, December 18, 2014

Java Tutorial For Beginners 4 - Variables and Types in Java

package lesson1;

public class MyClass {
 /*
 byte (number, 1 byte)
 short (number, 2 bytes)
 int (number, 4 bytes)
 long (number, 8 bytes)
 float (float number, 4 bytes)
 double (float number, 8 bytes)
 char (a character, 2 bytes)
 boolean (true or false, 1 byte)*/
 public static void main(String[] args) {
  int my_int = 10;
  float my_float = (float) 6.7;
  double my_double = 111.77;
  char my_char = 'A';
  boolean my_bool = true;
  System.out.println(my_int);
  System.out.println(my_float);
  System.out.println(my_double);
  System.out.println(my_char);
  System.out.println(my_bool);
 }

}

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Wednesday, December 17, 2014

Java Tutorial For Beginners 3 - Creating First Java Project in Eclipse IDE

package lesson1;

public class MyClass {

 public static void main(String[] args) {
  System.out.println("Hello Youtube");
 }

}

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Saturday, December 13, 2014

C Programming for Beginners 24 - Strings in C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
 char string1[12] = "Hello";
 char string2[12] = "world";
 char string3[12];

 strcpy(string3,string1); /// strcpy(dest ,source)
 strcat(string1,string2); /// add string 2 to string 1
 int length_string1 = strlen(string3);

 printf("strcpy = %s \n",string3);
 printf("strcat = %s \n",string1);
 printf("strlen = %d \n",length_string1);

 int value = strcmp(string1,string2);
 printf("strcmp = %d \n",value);
 return 0;
}

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Monday, December 8, 2014

C Programming for Beginners 23 - Passing Pointers as Function Arguments

#include <stdio.h>
#include <stdlib.h>
///A pointer is a variable whose value is the address of another variable

int getSum(int *array_val,int size)
{
    int sum=0;
    for(int i=0;i<size;i++)
    {
        sum += array_val[i];
    }
    return sum;
}

int main()
{
  int my_array[4]={10,20,30,40};
  int mySum = getSum(my_array,4);
  
  printf("the value of my sum is= %d",mySum)
  
}

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C Programming for Beginners 22 - Array of pointers

#include <stdio.h>
#include <stdlib.h>
///A pointer is a variable whose value is the address of another variable

void getValue(int *my_pointer)
{
    *my_pointer = 10000;///  &get_the_value=10000
    return;
}

int main()
{
  int get_the_value;
  getValue(&get_the_value);

  printf("the value of get_the_value = %d",get_the_value);
}

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Thursday, December 4, 2014

C Programming for Beginners 21 - Arrays in C

#include <stdio.h>
#include <stdlib.h>
///A pointer is a variable whose value is the address of another variable
int main()
{
  int val=30;
  int *pointer_p;
  pointer_p = &val;

  printf("address of val = %x \n", &val);

  printf("value of pointer variable = %x  \n", pointer_p);

  printf("value of *pointer = %d  \n", *pointer_p);
}

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C Programming for Beginners 20 - Passing Arrays as Function Arguments in C

#include <stdio.h>
#include <stdlib.h>

int ArraySum(int MyArray[],int size)
{
    int sum = 0;
   for(int i=0; i < size ;i++)
  {
     ///sum = sum + MyArray[i];
     sum += MyArray[i];
  }
    return sum;
}
int main()
{
  int MyNumberArray [8] = {20,30,60,50,55,30,100,100};///245 +100 +100 =445
  int sum_of_array = ArraySum(MyNumberArray, 8);

  printf("Arra Sum = %d ",sum_of_array);

}

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Tuesday, December 2, 2014

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Wednesday, November 26, 2014

C Programming for Beginners 18 - Arrays in C

#include <stdio.h>
#include <stdlib.h>

int main()
{
  int MyNumberArray [6] = {20,30,60,50,55,30};

  MyNumberArray[1]=45;

  for(int i=0;i<6;i++)
  {
     printf("element[%d]=%d \n",i,MyNumberArray[i]);
  }


}

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Sunday, November 23, 2014

How to install the Windows 10 Technical Preview on Windows 8 / 8.1 Right...

Download Windows Technical Preview

http://windows.microsoft.com/en-us/windows/preview-iso

Download VirtualBox

https://www.virtualbox.org/wiki/Downloads

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Wednesday, November 19, 2014

C Programming for Beginners 12 - do...while loop in C

#include <stdio.h>
#include <stdlib.h>
int main()
{
  int i=0;

  do
  {
    printf("Value of i= %d\n",i);
     //i=i+1;
     i++;
  } while (i > 10);

  printf("********************\n");

  int j=0;
  while (j > 10)
  {
     printf("Value of j= %d\n",j);
     //j=i+1;
     j++;
  }

}

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Tuesday, November 18, 2014

C Programming for Beginners 11 - While loop in C

#include <stdio.h>
#include <stdlib.h>
int main()
{
  int i=0;

  while (i <= 10)
  {
     printf("Value of i= %d\n",i);
     //i=i+1;
     i++;
  }

}

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