CODEWITHSUNDEEP
javacommand-linejavac
sadaf011
sadaf011

Reputation: 7

Java program compiling error

I started learning Java today. I installed jdk8, wrote a simple "Hello World" program and then executed this on command line: 

c:\java>java hello.java

But it shows this error:

Error: could not find or load main class hello.java

Then I also tried doing this:

c:\java>javac hello.java

Now it shows:

'javac' is not recognized ass an internal or external command,operable program or batch file

How to solve this and compile the Java program?

Upvotes: 0

Views: 570

Answers (2)

ashiquzzaman33
ashiquzzaman33

Reputation: 5741

Firstly You need to Set JAVA_HOME variable.

You can set JAVA_HOME variable in your Windows as

  1. Right click My Computer and select Properties.

  2. On the Advanced tab, select Environment Variables, and then edit JAVA_HOME to point to where the JDK software is located, for example, C:\Program Files\Java\jdk1.8.0_05.

Then you need to compile .java file

Compile java program by

c:\java>javac Hello.java

It generate '.class` file. To run it use

c:\java> java Hello  // Not Hello.class

Where Hello.class is your class file name.

Upvotes: 2

SSH
SSH

Reputation: 1627

you need to set JAVA_HOME variable...have a look here Setting JAVA_HOME

Set JAVA_HOME on a UNIX System

The JDK software is installed on your computer, for example, at /usr/jdk/jdk1.6.0_02. You can change this location.

Set JAVA_HOME.

Korn and bash shells:

export JAVA_HOME=jdk-install-dir
export PATH=$JAVA_HOME/bin:$PATH

Bourne shell:

JAVA_HOME=jdk-install-dir
export JAVA_HOME
PATH=$JAVA_HOME/bin:$PATH
export PATH

C shell:

setenv JAVA_HOME jdk-install-dir
setenv PATH $JAVA_HOME/bin:$PATH
export PATH=$JAVA_HOME/bin:$PATH
Change the permissions to enable you to run the GlassFish ESB Installer.

chmod 755 JavaCAPS.bin

Set JAVA_HOME on a Windows System

The JDK software is installed on your computer, for example, at C:\Program Files\Java\jdk1.6.0_02. You can move the JDK software to another location if desired.

Set JAVA_HOME:

Right click My Computer and select Properties.

On the Advanced tab, select Environment Variables, and then edit JAVA_HOME to point to where the JDK software is located, for example, C:\Program Files\Java\jdk1.6.0_02.

also you dont need to write .java when you are going to run your program i.e.

$javac abc.java

$java abc

Upvotes: 1

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