LinkedList implementation in JAVA

import java.util.Scanner; class Node {   int data;   Node next; } //**********************LinkedList Class**********************// public class LinkedList {  Node head;      public void insert(int d)       {             Node temp=new Node();            temp.data=d;           temp.next=null;           if(head==null)         {            head=temp;         }         else         {            Node n;            n=head;              while(n.next!=null)              {                n=n.next;               }                n.next=temp;          }     }    public void show()     {    Node s;    s=head;      while(s.next!=null)             {               System.out.println(s.data);               s=s.next;              }                System.out.println(s.data);       } } //*********************Driver Class***********************// import java.util.Scanner; public class Driver     {  public static void main(String []args)   {           Scanner s=new Scanner(System.in);           LinkedList l=new LinkedList();           int x;            do{                  System.out.println("Enter number in Linkedlist:");    int n=s.nextInt();    l.insert(n);    System.out.println("Do you want to enter another number(1=yes): ");    x=s.nextInt();           }while(x==1);                System.out.println("The numbers you entered in Linkedlist are:");   l.show();   } } import java.util.Scanner; class Node {   int data;   Node next; } //**********************LinkedList Class**********************// public class LinkedList {  Node head;  public void insert(int d)  {   Node temp=new Node();   temp.data=d;   temp.next=null;   if(head==null)   {    head=temp;   }   else   {    Node n;    n=head;    while(n.next!=null)    {     n=n.next;    }    n.next=temp;   }  }  public void show()   {    Node s;    s=head;    while(s.next!=null)    {    System.out.println(s.data);    s=s.next;    }    System.out.println(s.data);   } } //*********************Driver Class***********************// import java.util.Scanner; public class Driver {  public static void main(String []args)   {                 Scanner s=new Scanner(System.in);   LinkedList l=new LinkedList();   int x;                    do{    System.out.println("Enter number in Linkedlist:");    int n=s.nextInt();    l.insert(n);    System.out.println("Do you want to enter another number(1=yes): ");    x=s.nextInt();           }while(x==1);                System.out.println("The numbers you entered in Linkedlist are:");   l.show(); } }

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Enum class in java (Simple program)

Days.java

public enum Days
{
Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday
};

Test.java

public class Test
{
public static void main(String []args)
{
Days d;
Days enumarr[]=Days.values();
for(Days x:enumarr)
{
System.out.print(x.ordinal());  // it should print the constant value
System.out.print(" "+x);   // it should print all the days
System.out.print("\n");
}
System.out.println("Printing using Valueof()");
System.out.println(Days.valueOf("Friday"));        //it should print Friday
}
}

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Three dimensional array in java using ForEachLoop

import java.util.*;
public class ForEachLoop
{
public static void main(String []args)
{

Scanner s=new Scanner(System.in);
System.out.println("Enter number of Pages:");
int p=s.nextInt();
System.out.println("Enter number of rows:");
int r=s.nextInt();
System.out.println("Enter number of colums:");
int c=s.nextInt();

int arr[][][]=new int[p][][];

for(int i=0;i<p;i++)
        {
arr[i]=new int[r][];

            for(int k=0;k<r;k++)
            {

                arr[i][k]=new int[c];
            }
        }


System.out.println("Enter numbers in Three dimentional Array:");

for(int j=0;j<arr.length;j++)
for(int i=0;i<arr[j].length;i++)
for(int k=0;k<arr[j][i].length;k++)
{
arr[j][i][k]=s.nextInt();
}


System.out.println("printing");

for(int x[][] : arr)
for(int i[]:x)
for(int j:i)
{
System.out.println(j);
}

}
}

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Predefined Array-Copy method in JAVA

public class ArrayCopy
{
public static void main(String []args)
{
int arr[]=new int[]{1,2,3,4,5,6,7,8,9,10};
for(int i:arr)
{
System.out.print(i);
}
int arr1[]=new int[10];
System.arraycopy(arr,5,arr1,0,5);
for(int i:arr1)
{
System.out.println(i);
}
}
}

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User Define Class array Simple Java program

import java.util.Scanner;

public class ZamaCodes
{
public static void main(String[] args)
{
Employee E=new Employee();
Employee Earr[]=new Employee[5];
        System.out.println(E.getAge());
   
    for(int k=0;k<5;k++)
    {
         Earr[k]=new Employee();
    }

        Earr[0].setAge(10);
Earr[1].setAge(20);

       System.out.println(Earr[0].getAge());
       System.out.println(Earr[1].getAge());

}
}




public class Employee {
    
    private String name;
    private int age;
    private float salary;
    
    public Employee()
    {
        name=null;
        age=0;
        salary=0;
    }
    public Employee(String name,int age,float Salary)
    {
        this.name=name;
       this.age=age;
        this.salary=Salary;
    }
    
    
//**********************setters*************************//

    public void setAge(int age) {
        this.age = age;
    }

    public void setName(String name) {
        this.name = name;
    }

    public void setSalary(float salary) {
        this.salary = salary;
    }
//**********************Getters*************************//
    public String getName() {
        return name;
    }

    public int getAge() {
        return this.age;
    }

    public float getSalary() {
        return salary;
    }

    public void aging()
    {
        this.age=this.age+1;
    }    
}

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Find x position in Matrix (JAVA)

 Declare, Instantiate, initialize and print a 2Dimensional array of numbers as follows.                                   

 Given a matrix and a number x, find the position of x in the matrix if it is present in it else print “Not Found”.  

import java.util.Scanner;
public class ZamaCodes
{
public static void main(String []args)
{
int arr[][]=new int[4][];
arr[0]=new int[1];
arr[1]=new int[2];
arr[2]=new int[3];
arr[3]=new int[4];

Scanner s=new Scanner(System.in);
System.out.println("Enter the numbers");
for(int i=0;i<arr.length;i++)
for(int k=0;k<arr[i].length;k++)
{

arr[i][k]=s.nextInt();

}

System.out.println("Printing");
for(int v[] : arr)
for(int x : v)
{
System.out.println(x);
}

System.out.println("Enter the number you want to search in 2d array:");
int x;
x=s.nextInt();

for(int i=0;i<arr.length;i++)
for(int k=0;k<arr[i].length;k++)
if(x==arr[i][k])
{
System.out.println("Value found at index"+"ROW="+i+"Colum="+k);
}
else
{
System.out.println("Not Found");
}
}
}

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Initialize 1-D array of 10 numbers and get minimum and maximum in JAVA

Declare and initialize a one-dimensional array of 10 numbers and get the minimum number of an array using methods.

import java.util.Scanner;
public class ZamaCodes
{
public static void main(String []args)
{
Scanner s=new Scanner(System.in);
int arr[]=new int[10];
System.out.println("Enter 10 numbers in an array:");
for(int i=0;i<10;i++)
{
arr[i]=s.nextInt();
}

Zamacodes q=new Zamacodes();
System.out.println("The minimum number in an array is "+q.min(arr));
System.out.println("The maximum number in an array is "+q.max(arr));

}

int min(int arr[])
{
int m=1;
for(int i=0;i<arr.length;i++)
{
if(arr[i]<m)
{
m=arr[i];
}
}
return m;
}

int max(int arr[])
{
int ma=1;
for(int i=0;i<arr.length;i++)
{
if(arr[i]>ma)
{
ma=arr[i];
}
}
return ma;
}
}

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Declaration of one dimensional array of numbers and characters in JAVA

-Declare and initialize two one dimensional arrays with 1) Numbers  2) Characters 1.1-Print the content of both arrays 1.2-Get the length of both arrays and print 

import java.util.Scanner;
public class SimpleJavaProgram
{
public static void main(String []args)
{
int arr[];


Scanner s=new Scanner(System.in);
int x;
System.out.println("How many elements you want to store in an array?");
x=s.nextInt();
arr=new int[x];
for(int i=0;i<arr.length;i++)
{
arr[i]=s.nextInt();
}
System.out.println("Print the values");
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}

System.out.println("How many number you want to store in charactor array?");
int c=s.nextInt();
char ch[]=new char[c];

for(int i=0;i<ch.length;i++)
{
ch[i]=s.next().charAt(0);
}
for(int i=0;i<ch.length;i++)
{
System.out.println(ch[i]);
}
System.out.print(arr.length);
}
}

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Use of Objects in Java (Basic Program)

The below program we created three files named as Client, Student, and Marker. We declare the main method in Client class. The objective of this program is to show you the use of objects in java.
For Compilation Javac -d . Client.java  is used. And for execution Java Client is used.

Student.java


package Student;

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

}

Marker.java

package Marker;

public class Marker
{
    public String color;
public boolean type;
public int inkLevel;
}

Client.java

package Client;

import Marker.*;

import Student.*;

import java.util.Scanner;

public class Client

{

public static void main(String []args)

{

Scanner s=new Scanner(System.in);

int y;

int z;

System.out.println("How many students data you want to store:");

y=s.nextInt();

Student x[]=new Student[y];

for(int i=0;i<y;i++)

{

x[i]=new Student();

System.out.println("Enter your age:");

x[i].age=s.nextInt();

System.out.println("\n Enter your name:");

x[i].name=s.next();

System.out.println("\n Enter your Id:");

x[i].id=s.nextInt();

}

System.out.println("How many markers data you want to store:");

z=s.nextInt();

        Marker m[]=new Marker[z];

for(int i=0;i<z;i++)

{

m[i]=new Marker();

System.out.println("Enter Marker color:");

m[i].color=s.next();

System.out.println("Enter Marker type:");

m[i].type=s.nextBoolean();

System.out.println("Enter Marker Inklevel:");

m[i].inklevel=s.nextInt();

}

System.out.println("\n Printing Student data");

for(int i=0;i<y;i++)

{

System.out.println(x[i].id);

System.out.println(x[i].name);

System.out.println(x[i].age);

}

System.out.println("\n Printing Marker data");

for(int i=0;i<z;i++)

{

System.out.println(m[i].type);

System.out.println(m[i].color);

System.out.println(m[i].inklevel);

}

}

}

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Three Dimension Array in Java (Simple program)

import java.util.Scanner;

public class ThreeDArray
{
public static void main(String []args)
{
Scanner s=new Scanner(System.in);
System.out.println("Enter number of Pages:");
int p=s.nextInt();
System.out.println("Enter number of rows:");
int r=s.nextInt();
System.out.println("Enter number of colums:");
int c=s.nextInt();

int arr[][][]=new int[p][r][c];

System.out.println("Enter numbers in Three dimentional Array:");

for(int j=0;j<arr.length;j++)
for(int i=0;i<arr.length;i++)
for(int k=0;k<arr.length;k++)
{
arr[i][j][k]=s.nextInt();
}
System.out.println("printing");

for(int j=0;j<arr.length;j++)
for(int i=0;i<arr.length;i++)
for(int k=0;k<arr.length;k++)
{
System.out.println(arr[i][j][k]);
}
}
}

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Two Dimension Arrays in Java (Simple program)

import java.util.Scanner;
public class TwoDArray
{
public static void main(String []args)
{
Scanner s=new Scanner(System.in);
System.out.println("Enter number of rows:");
int a=s.nextInt();
System.out.println("Enter number of colums:");
int b=s.nextInt();
int arr[][]=new int[a][b];

System.out.println("Enter numbers in Two dimentional Array:");

for(int j=0;j<arr.length;j++)
for(int i=0;i<arr.length;i++)
{
arr[i][j]=s.nextInt();
}

System.out.println("Printing");
for(int j=0;j<arr.length;j++)
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i][j]);
}
}
}

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One Dimention Arrays in JAVA Simple Program

import java.util.Scanner;
public class SingleArray
{
public static void main(String []args)
{
Scanner s=new Scanner(System.in);
System.out.println("Enter size of an array:");
int x=s.nextInt();
int arr[]=new int[x];
System.out.println("Enter Numbers in an array:");
for(int i=0;i<arr.length;i++)
{
arr[i]=s.nextInt();
}
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
}

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