jjryu
2011. 8. 8. 22:33
$ jar
System(.exit()) // static
.getProperty() // String, static
"file.encoding"
"user.home"
"java.version"
.getenv()
read only
"JAVA_HOME"
.currentTimeMillis()
java.util.Random
.nextInt()
java.util.Calendar // JDK 1.1
e.g. Calendar cal = Calendar.getInstance();
java.util.Math
.sqrt() // static