Scala applet details and example code
- 2020-06-01 09:50:29
- OfStack
Scala small program details
The & # 65279; 1. Interactive mode
In the command line window, enter the Scala command:
xiaosi@Qunar:~$ scala
Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_91).
Type in expressions for evaluation. Or try :help.
scala>
The first small program:
xiaosi@Qunar:~$ scala
Welcome to Scala 2.11.8 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_91).
Type in expressions for evaluation. Or try :help.
scala> println("Hello world")
Hello world
scala>
2. Script mode
Script mode 1 of the small program:
object Test{
def main(args: Array[String]){
println("Hello " + args(0) + " ....")
}
}
Let's take a look at how to save the file, compile, and run the program. Follow these steps:
(1) save the code as Test.scala
(2) open the command window, then go to the directory where the program files are saved, which is /home/xiaosi/test
(3) compilation
xiaosi@Qunar:~/test$ scalac test.scala
The above command will generate several class files in the current directory:
xiaosi@Qunar:~/test$ ls
sh_env.sh sh_env.sh~ Test.class Test$.class test.scala tomcat-bin-sh
One of them is called Test.class, which is a bytecode that can run on the Java virtual machine (JVM)
(4) operation
xiaosi@Qunar:~/test$ scala test.scala apple
Hello apple ....
xiaosi@Qunar:~/test$
You can see Hello apple... The output
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