java - File.canExecute() says every file is executable? -

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this question has answer here:

i using code test it;

public class canexecutetest {     public static void main (string[] args) {         file currentdir = new file(system.getproperty("user.dir"));         traverse(currentdir);     }      public static void traverse(file dir) {         string[] filesanddirs = dir.list();         (string fileordir : filesanddirs) {             file f = new file(dir, fileordir);             if (f.isdirectory()) {                 traverse(f);             } else {                 system.out.print(f);                 if (f.canexecute()) {                     system.out.println(" can execute");                 } else {                     system.out.println(" cannot execute");                 }             }         }     } }

this outputs every file executable file. doing wrong here, or java bug? on windows 7, netbeans 7.3.1 , java 7.

canexecute() doesn't test executability, tests whether current program (i.e. yours) permitted execute it. example, if changed permissions of 1 of files 000 (no read, write, or execute user), canexecute() return false jvm not have permission execute (or read) file.

if want check executable files, create method parses files suffix , returns true when finds .exe (or .app on os x).


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