作为一个有Java背景的人,我尝试在创建.bat
脚本中引入一些熟悉的约定。
下面的脚本演示了定义两个过程的方法。
@ECHO OFF
SET firstInstanceVariable="Hello world!"
SET secondInstanceVariable="Good bye world!"
GOTO:MAIN
:firstMethodName
SETLOCAL ENABLEDELAYEDEXPANSION
SET firstArgumentPassedIn=%~1
SET secondArgumentPassedIn=%~2
ECHO %firstInstanceVariable%
ECHO "The first argument passed in was %firstArgumentPassedIn%"
ECHO "The second argument passed in was %secondArgumentPassedIn%"
ENDLOCAL
EXIT /B 0
:secondMethodName
SETLOCAL ENABLEDELAYEDEXPANSION
SET firstArgumentPassedIn=%~1
SET secondArgumentPassedIn=%~2
ECHO %secondInstanceVariable%
ECHO "The first argument passed in was %firstArgumentPassedIn%"
ECHO "The second argument passed in was %secondArgumentPassedIn%"
ENDLOCAL
EXIT /B 0
:MAIN
call:firstMethodName "The Quick Brown" "Fox Jumps Over"
call:secondMethodName "1 2 3 4" 3.14
注意,需要显式的 GOTO:MAIN
命令来跳过过程定义。
这是因为在决定读取之前必须跳过过程。否则,过程将被执行。
下面的代码演示了一个接近上述 .bat
脚本的 Java 等效版本。
public class MyObject {
private String firstInstanceVariable = "Hello world!";
private String secondInstanceVariable = "Good bye world!";
public void firstMethodName(Object... arguments) {
String firstArgumentPassedIn = arguments[0].toString();
String secondArgumentPassedIn = arguments[1].toString();
System.out.println(firstInstanceVariable);
System.out.format("The first argument passed in was %s", firstArgumentPassedIn);
System.out.format("The second argument passed in was %s", secondArgumentPassedIn);
}
public void secondMethodName(Object... arguments) {
String firstArgumentPassedIn = arguments[0].toString();
String secondArgumentPassedIn = arguments[1].toString();
System.out.println(secondInstanceVariable);
System.out.format("The first argument passed in was %s", firstArgumentPassedIn);
System.out.format("The second argument passed in was %s", secondArgumentPassedIn);
}
public static void main(String[] args) {
MyObject myObject = new MyObject();
myObject.firstMethodName("The Quick Brown", "Fox Jumps Over");
myObject.secondMethodName(new Integer[]{1,2,3,4}, 3.14);
}
}
CALL
a subroutine (:label
)的部分。 - bobobobo