Need help with Server Gui giving error

'java' is not recognized as an internal or external command,
operable program or batch file.

using System;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;
using System.IO;
using Novus_Gui.Properties;

namespace Novus_Gui
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public void button1_Click(object sender, EventArgs e)
        {

            Process ServerProcess = new Process();
            ServerProcess.StartInfo.UseShellExecute = false;
            ServerProcess.StartInfo.FileName = "CMD.exe";
            ServerProcess.StartInfo.Arguments = "/c java -jar Server.jar";
            ServerProcess.StartInfo.CreateNoWindow = true;
            ServerProcess.StartInfo.ErrorDialog = false;
            ServerProcess.StartInfo.RedirectStandardError = true;
            ServerProcess.StartInfo.RedirectStandardOutput = true;
            ServerProcess.StartInfo.RedirectStandardInput = true;
            ServerProcess.Start();
            StreamWriter inputWriter = ServerProcess.StandardInput;
            StreamReader outputReader = ServerProcess.StandardOutput;
            StreamReader errorReader = ServerProcess.StandardError;
            ServerProcess.WaitForExit();
            //Display Outputs
            string displayText = "Output" + Environment.NewLine + "==============" + Environment.NewLine;
            displayText += outputReader.ReadToEnd();
            displayText += Environment.NewLine + "Error" + Environment.NewLine + "==============" +
                           Environment.NewLine;
            displayText += errorReader.ReadToEnd();
            richTextBox1.Text = displayText;
        } 
    }
}