Program to demonstrate Load Balancing Algorithm (Java)

import java.io.*; import java.util.*; class loadbal { public void loadbalancer(int servers,int processes ) { int[] s=new int[servers]; int eachProcess = processes/servers; for(int i=0;i<servers;i++) { s[i]=eachProcess; } int remainProcess= processes % servers; for(int j=0,i=remainProcess;i>0 && j<servers;i--,j++) { s[j] = s[j] +1; } for(int i=0; i<servers;i++) { System.out.println( "\nServer " + (i+1) +" = " + s[i] + " " ); } } public static void main(String args[])throws IOException { loadbal lb= new loadbal(); int servers=0,processes=0,input; int choice; Scanner scrinp = new Scanner(System.in); do { System.out.println("Please enter your choice => \n1. Add Servers 2. Remove Servers 3. Add Process 4. Remove Process 5.Exit "); choice= scrinp.nextInt(); switch(choice) { case 1: System.out.println("ENter the no. of servers to be added "); input = scrinp.nextInt(); while(input < 0) { System.out.println("\nInvalid input."); System.out.println("\nPlease reENter the no. of servers to be added "); input = scrinp.nextInt(); } servers += input; lb.loadbalancer(servers,processes); break; case 2: System.out.println("ENter the no. of servers to be removed "); input = scrinp.nextInt(); while(input < 0 || input > servers) { System.out.println("\nInvalid input."); System.out.println("\nPlease reENter the no. of servers to be removed "); input = scrinp.nextInt(); } servers -= input; lb.loadbalancer(servers,processes); break; case 3: System.out.println("ENter the no. of processes to be added "); input = scrinp.nextInt(); while(input < 0) { System.out.println("\nInvalid input."); System.out.println("\nPlease reENter the no. of processes to be added "); input = scrinp.nextInt(); } processes += input; lb.loadbalancer(servers,processes); break; case 4: System.out.println("ENter the no. of processes to be removed "); input = scrinp.nextInt(); while(input < 0 || input > servers) { System.out.println("\nInvalid input."); System.out.println("\nPlease reENter the no. of processes to be removed "); input = scrinp.nextInt(); } processes -= input; lb.loadbalancer(servers,processes); break; case 5: System.exit(0); default: System.out.println("\nInvalid Choice "); } }while(true); } }

Output:
// C:\Users\GRIMM\Desktop>javac loadbal.java
// C:\Users\GRIMM\Desktop>java loadbal
// Please enter your choice =>
// 1. Add Servers 2. Remove Servers 3. Add Process 4. Remove Process 5.Exit
// 1
// ENter the no. of servers to be added
// 4


// Server 1 = 0


// Server 2 = 0


// Server 3 = 0


// Server 4 = 0
// Please enter your choice =>
// 1. Add Servers 2. Remove Servers 3. Add Process 4. Remove Process 5.Exit
// 2
// ENter the no. of servers to be removed
// 1


// Server 1 = 0


// Server 2 = 0


// Server 3 = 0
// Please enter your choice =>
// 1. Add Servers 2. Remove Servers 3. Add Process 4. Remove Process 5.Exit
// 4
// ENter the no. of processes to be removed
// 2


// Server 1 = 0


// Server 2 = 0


// Server 3 = 0
// Please enter your choice =>
// 1. Add Servers 2. Remove Servers 3. Add Process 4. Remove Process 5.Exit
// 1
// ENter the no. of servers to be added
// 4


// Server 1 = 0


// Server 2 = 0


// Server 3 = 0


// Server 4 = 0


// Server 5 = 0


// Server 6 = 0


// Server 7 = 0
// Please enter your choice =>
// 1. Add Servers 2. Remove Servers 3. Add Process 4. Remove Process 5.Exit