'java' Command

Description

Execute Java classes/applications

Technical Specification (partial)

java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...]

-Dmyprop=myval set a system property. retrieval: System.getProperty("myprop");

Notes

• Classpath Searching:
  
  1. JRE
  2. Environment Variable (classpath)
  3. Command-Line Classpath (overrides environment variable)
• Directory Delimitor: unix '/', Mac '/', Windows '\'
• Classpath Separator: unix ':', Mac ':', Windows ';'
• Current Directory: '.'
• First class found is the one used. Searching stops when first class is found.

Examples

bash script

javac -d build -sourcepath src src/com/bryanpugh/scjp/MyClass.java

ant

<project basedir=".">
<target name="">
<mkdir dir="${basedir}/build"/> <javac srcdir="${basedir}/src" destdir="${basedir}/build"/>
</target name="">
</project>

'javac' Command

Description

Compile java files.

Technical Specification (partial)

javac [options] [sourcefiles]

• -cp or -classpath path - ':' or ';' separated list of locations to search for source files
• -sourcepath path - ':' or ';' separated list of location to search for classes, interfaces, etc
• -d directory - the destination for .class files
  
  • does not create target directory
  • does create package path directories

Notes

• Classpath Searching:
  
  1. JRE
  2. Environment Variable (classpath)
  3. Command-Line Classpath (overrides environment variable)
• Directory Delimitor: unix '/', Mac '/', Windows '\'
• Classpath Separator: unix ':', Mac ':', Windows ';'
• Current Directory: '.'
• First class found is the one used. Searching stops when first class is found.

Examples

bash script

javac -d build -sourcepath src src/com/bryanpugh/scjp/MyClass.java

ant

<project basedir=".">
<target name="compile">
<mkdir dir="build"/> <javac srcdir="src" destdir="build"/>
</target name="compile">
</project>