Environment variable PATH should be set to point to where the Java binaries have been installed. Refer to your shell documentation if you have trouble doing this.Example, if you use bash as your shell, then you would add the following line to the end of your '.bashrc: export PATH=/path/to/java:$PATH'

Following are the required steps −Assuming you have installed Java in c:\Program Files\java\jdk directory −Right-click on 'My Computer' and select 'Properties'.Click the 'Environment variables' button under the 'Advanced' tab.Now, alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.

Following are the required steps −Open a command prompt.Type following commands:C:\> set path=C:\Program Files\Java\jdk1.8.0_23\bin

Set pathAssuming you have installed Java in c:\Program Files\java\jdk directory −Right-click on 'My Computer' and select 'Properties'.Click the 'Environment variables' button under the 'Advanced' tab.Now, alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.Set ClasspathAssuming you have stored your Java programs in c:\myprograms\ directory −Right-click on 'My Computer' and select 'Properties'.Click the 'Environment variables' button under the 'Advanced' tab.Now, add the 'CLASSPATH' variable and set the path to the c:\myprograms\'.Read More

Assuming you have stored your Java programs in c:\myprograms\ directory −Right-click on 'My Computer' and select 'Properties'.Click the 'Environment variables' button under the 'Advanced' tab.Now, add the 'CLASSPath' variable and set the path to the c:\myprograms\'.

JAVA_HOME refers to jdk/bin directory. It is used by a java based application.

Setting Up the Path for WindowsAssuming you have installed Java in c:\Program Files\java\jdk directory −Right-click on 'My Computer' and select 'Properties'.Click the 'Environment variables' button under the 'Advanced' tab.Now, alter the 'Path' variable so that it also contains the path to the Java executable. Example, if the path is currently set to 'C:\WINDOWS\SYSTEM32', then change your path to read 'C:\WINDOWS\SYSTEM32;c:\Program Files\java\jdk\bin'.

During compile time, java compiler (javac) takes the source file .java file and convert it to bytecode .class file.

Compiling and running a java program is very easy after JDK installation. Following are the steps −Open a command prompt window and go to the directory where you saved the java program (MyFirstJavaProgram.java). Assume it's C:\.Type 'javac MyFirstJavaProgram.java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption: The path variable is set).Now, type 'java MyFirstJavaProgram' to run your program.You will be able to see the result printed on the window. Start learning Java with our Java tutorial from scratch.Read More

Compiling a Java program is very easy after JDK installation. Following are the steps −Open a command prompt window and go to the directory where you saved the java program. Assume it's C:\.Type 'javac MyFirstJavaProgram.java' and press enter to compile your code. If there are no errors in your code, the command prompt will take you to the next line (Assumption: The path variable is set).The file is compiled and you can see MyFirstJavaProgram.class file generated in the same folder.