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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