Source: Let's say your file is in C: mywork Run Command Prompt C: > cd mywork This makes C: mywork the current directory. C: mywork> dir This displays the directory contents. You should see filenamehere.java among the files. C: mywork> set path=%path%;C: Program Files Java jdk1.5.0_09 bin This tells the system where to find JDK programs.
C: mywork> javac filenamehere.java This runs javac.exe, the compiler. You should see nothing but the next system prompt. C: mywork> dir javac has created the filenamehere.class file. You should see filenamehere.java and filenamehere.class among the files. C: mywork> java filenamehere This runs the Java interpreter. You should then see your program output. If the system cannot find javac, check the set path command.
If javac runs but you get errors, check your Java text. If the program compiles but you get an exception, check the spelling and capitalization in the file name and the class name and the java HelloWorld command. Java is case-sensitive! On Windows 7 I had to do the following: quick way • Install JDK • in windows, browse into 'C: Program Files Java jdk1.8.0_91 bin' (or wherever the latest version of JDK is installed), hold down shift and right click on a blank area within the window and do 'open command window here' and this will give you a command line and access to all the BIN tools. 'javac' is not by default in the windows system PATH environment variable. • Follow comments above about how to compile the file ('javac MyFile.java' then 'java MyFile') long way • Install JDK • After installing, in edits the Windows PATH environment variable and adds the following to the path C: ProgramData Oracle Java javapath.
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