檢視 SCJP 1.6版考題 078 的原始碼

 A developer is creating a class Book, that needs to access class Paper. 
 The Paper class is deployed in a JAR named myLib.jar. 
 
 Which three, taken independently, will allow the developer to use the Paper class while compiling the Book class?
  (Choose Three.)
   A. The JAR file is located at $JAVA_HOME/jre/classes/myLib.jar.
   B. The JAR file is located at $JAVA_HOME/jre/lib/ext/myLib.jar.
   C. The JAR file is located at /foo/myLib.jar and a classpath environment variable is set 
      that includes /foo/myLib.jar/Paper.class.
   D. The JAR file is located at /foo/myLib.jar and a classpath environment variable is set 
      that includes /foo/myLib.jar.
   E. The JAR file is located at /foo/myLib.jar and the Book class is compiled using 
      javac –cp /foo/myLib.jar/Paper Book.java
   F. The JAR file is located at /foo/myLib.jar and the Book class is compiled using 
      javac -d /foo/myLib.jar Book.java
   G. The JAR file is located at foo/myLib.jar and the Book class is compiled using 
      javac –classpath /foo/myLib.jar Book.java

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<span style="font-size:medium;">解答</span>

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<span style="font-size: medium;">Ans: B D G    </span>

<span style="font-size:medium;"> 解說:
 一個程式發展者正在建立一個類別Book，這個類別必須存取類別Paper，類別Paper被佈署在一個名為myLib.jar的JAR檔案，
 下列那三個可以分別地被這個發展者用來使用類別Paper，在編譯類別Book時
 $JAVA_HOME/jre/lib/ext是Java執行環境預設放置JAR檔的地方
 若不是放在這個地方，就要配合classpath的設定或指定，如答案BDG

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{{SCJP 1.6版考題講解}}