<> Zero , Single choice questions

*
About JDK What's right is that :
A,JRE Contains JDK,JDK Contains JVM
B,JDK yes Java Short for runtime environment
C,Java The key to platform independence JDK
D,javac ,java Wait for the order JDK Commands in

*
The following defines the code for the main method , There are several mistakes
class Hello{ public static void main(String[] args){ System.out.printIn("hi");
} }
A,1 place
B,2 place
C,3 place
D, No errors

<> One , Multiple choice questions

* What is the correct statement in the following options :
A,Java The compile command for the file is java
B, Configure environment variables Path Time , To configure to JDK In the installation directory bin catalog
C, Enter in the command line window cd java command , Can be displayed java All files under folder
D, Execute on the command line Java Code time , After configuring the environment variables , You need to restart the command line window to take effect
<> Two , analysis

*

The question is right Java Cognition of code compilation and running environment ,D The option is correct .A Wrong option , Should be JDK contain JRE,JRE Contains JVM virtual machine ,B Wrong option ,JRE yes Java Short for runtime environment ,JDK It's a software development kit ,C Wrong option ,JVM yes Java The key to platform independence , Implement a compilation , Running everywhere .

*

The question is right Java Cognition of program execution process and common operation commands ,BD The option is correct .A Wrong option ,Java The compile command for the file is javac, Explain that the execution command is java,C Wrong option , Enter in the command line window cd
java command , You can switch to java folder .

*
The answer is A, No resolution , It's a coding problem .

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