java 7 setup in ubuntu 14.04 64bit

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java 7 download page

http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html


tar xvf jdk-7u75-linux-x64.tar.gz

sudo mkdir /usr/local/jvm

sudo mv ./jdk1.7.0_75 /usr/local/jvm/

# update-alternatives --install /usr/bin/javac javac /usr/local/jvm/jdk1.7.0_75/bin/javac 1
update-alternatives: using /usr/local/jvm/jdk1.7.0_75/bin/javac to provide /usr/bin/javac (javac) in auto mode

# update-alternatives --install /usr/bin/java java /usr/local/jvm/jdk1.7.0_75/bin/java 1
update-alternatives: using /usr/local/jvm/jdk1.7.0_75/bin/java to provide /usr/bin/java (java) in auto mode


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c# mqtt client example

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using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using uPLibrary.Networking.M2Mqtt; using uPLibrary.Networking.M2Mqtt.Messages; namespace MQTTTest {     public partial class Form1 : Form     {         MqttClient client;         public Form1()         {             InitializeComponent();             //client = new MqttClient("broker.hivemq.com");             client = new MqttClient("192.168.0.83");             byte code = client.Connect(Guid.NewGuid().ToString());             client.ProtocolVersion = MqttProtocolVersion.Version_3_1;            ...
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