What are the improvements on Try-With-Resources in Java9?

In Java7, try-with-resources syntax needed a fresh variable to be declared for each resource being managed by the statement. Java9 has improved this statement by eliminating the need of new variable to be created.

FileOutputStream fileOutputStream =  new FileOutputStream("/file.txt");
 try(FileOutputStream fileOutputStream=fileOutputStream){  
  //do some operation
  }
// Everytime we need to create new variable in Java 7

// Java 9
FileOutputStream fileOutputStream =  new FileOutputStream("/file.txt");
 try(fileOutputStream){  
  //do some operation
  }

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What are the improvements on Try-With-Resources in Java9?

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