使用javac編譯java時忽略未解決的符號

Question

我在STS和it reports missing class中使用Google插件。我決定去一個快速和骯髒的方式，下載類，編譯它，並將其放入插件文件夾或jar文件。

類是在這裏：Java2HTMLEntityReader.java

當我編譯，我當然得到一些錯誤：

Java2HTMLEntityReader.java:19: error: package org.eclipse.jdt.internal.compiler.parser does not exist 
import org.eclipse.jdt.internal.compiler.parser.*; 
^ 
Java2HTMLEntityReader.java:28: error: cannot find symbol 
public class Java2HTMLEntityReader extends SubstitutionTextReader { 
             ^
    symbol: class SubstitutionTextReader 
Java2HTMLEntityReader.java:58: error: cannot find symbol 
       setSkipWhitespace(false); 
       ^
    symbol: method setSkipWhitespace(boolean) 
    location: class Java2HTMLEntityReader 
Java2HTMLEntityReader.java:69: error: cannot find symbol 
         c = nextChar(); 
          ^
    symbol: method nextChar() 
    location: class Java2HTMLEntityReader 
Java2HTMLEntityReader.java:105: error: cannot find symbol 
       } else if (!ScannerHelper.isWhitespace((char) c)) { 
          ^
    symbol: variable ScannerHelper 
    location: class Java2HTMLEntityReader 
Note: Java2HTMLEntityReader.java uses unchecked or unsafe operations. 
Note: Recompile with -Xlint:unchecked for details. 
5 errors 

那是因爲我沒有給Java編譯器指向同包。我不打算！我想用這些錯誤編譯它，我認爲它會在我將它放在正確的類路徑上時起作用。