I got a bunch of errors, wich i am not able to fix

So i watched the video on serialization. I wrote the same code as the instructor/tutor, but i got a bunch of error-messages and wasnt able to compile. Here is my Treets.java:

package com.teamtreehouse;
import java.io.*;

public class Treets {

  public static void save(Treet[] treets){
    try (
      FileOutputStream fos = new FileOutputStream("treets.ser");
      ObjectOutputStream oos = new ObjectOutputStream(fos);
    ) {
      oos.writeObject(treets);
    } catch(IOException ioe) {
      System.out.println("Problem saving Treets");
      ioe.printStackTrace();
    }
  }
}

My Errors: Picked up JAVA_TOOL_OPTIONS: -Xmx128m
Picked up _JAVA_OPTIONS: -Xmx128m
./com/teamtreehouse/Treets.java:8: error: <identifier> expected
public void static save(Treet[] treets){
^
./com/teamtreehouse/Treets.java:8: error: '(' expected
public void static save(Treet[] treets){
^
./com/teamtreehouse/Treets.java:8: error: invalid method declaration; return type required
public void static save(Treet[] treets){
^
./com/teamtreehouse/Treets.java:23: error: class, interface, or enum expected
}

I don't even get the first error-message. I am sitting here really frustrated...