java 7 features not working on ubuntu with java version "1.7.0_51" -


according java -version ubuntu java environment like:

java version "1.7.0_51" openjdk runtime environment (icedtea 2.4.4) (7u51-2.4.4-0ubuntu0.12.04.2) openjdk 64-bit server vm (build 24.45-b08, mixed mode)

my javac -version is: 

   javac 1.6.0_30

how change javac version? tip @sotiriosdelimanolis. ;) (if reading , have same problem read comments. link page describes how on ubuntu).

i trying run following program: 

 import java.util.*;     class separate {      public static void main(string[] args) {       string text = "<head>first program</head> <body>hello world</body>";      set<string> words = new treeset<>(); //1 compiler error      try(scanner tokenizingscanner = new scanner(text)) { //2 compiler error       tokenizingscanner.usedelimeter("\\w");       while(tokenizingscanner.hasnext()) {             string word = tokenizingscanner.next();             if(!word.trim().equals("")) {                     words.add(word);             }       } //end while      } //end try              for(string word: words) {                     system.out.print(word + " ");             } //end      }

i receive these errors upon trying compile: 

 separate.java:8: illegal start of type  set<string> words = new treeset<>();                                  ^  separate.java:9: '{' expected  try(scanner tokenizingscanner = new scanner(text)) {      ^  separate.java:9: ')' expected  try(scanner tokenizingscanner = new scanner(text)) {              ^  separate.java:9: ';' expected  try(scanner tokenizingscanner = new scanner(text)) {                                                    ^  separate.java:9: 'try' without 'catch' or 'finally'  try(scanner tokenizingscanner = new scanner(text)) {   ^   separate.java:24: reached end of file while parsing   }   ^   6 errors

these errors seem should not errors. first error showing diamond notation found in java 7 not correct syntax or when correct. error shown 1 above in comments.

the other errors stemming scanner object creation in try block try resources java 7 feature. line marked 2 above in source code.

does know missing?

sounds code not compiled under jdk 7. check version of compiler (as sotirios mentioned)


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