How to check code for errors

Question

how can I read code from a .java file and return whether it is compilable or if there are errors in the code?

Answer 1

I wrote this code:
public boolean Compilable ()
try
Process process = Runtime.getRuntime ().exec ("javac Test.java");
catch (Exception e)
return false;
return true;
but it throws this exception:
java.io.IOException: CreateProcess: javac Test.java error=2
     at java.lang.ProcessImpl.create(Native Method)
     at java.lang.ProcessImpl.<init>(ProcessImpl.java:81)
     at java.lang.ProcessImpl.start(ProcessImpl.java:30)
     at java.lang.ProcessBuilder.start(ProcessBuilder.java:451)
     at java.lang.Runtime.exec(Runtime.java:591)
     at java.lang.Runtime.exec(Runtime.java:429)
     at java.lang.Runtime.exec(Runtime.java:326)
     at Test.main(Test.java:7)
     at __SHELL27.run(__SHELL27.java:6)
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:585)
     at bluej.runtime.ExecServer$3.run(ExecServer.java:855)
what am I doing wrong?