Error about Source Level only if 5.0? I'm using Java 1.6? Maps

Question

Hello everyone. I was just trying to run some simple Source Code from my book here:
package mapa;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class MapTest
     Map<String, String> phonebook = new HashMap<String, String>();
    // constructor
    public example2(String n[], String nums[]) {
       for(int i=0; i< n.length; i++)
           phonebook.put( n, nums[i] );
public static void main(String[] args) {
// data
String [] names = { "Lefty", "Guarav", "Wong", "Rupamay" };
String [] extns = { "4873", "4810", "3769", "0" };
// get an instance of this class
example2 ex = new example2( names, extns );
// dump out the map
System.out.println("map: " + ex.phonebook);
// get the mappings
Set<Map.Entry<String,String>> s = ex.phonebook.entrySet();
// iterate over the mappings
// for (Iterator i = s.iterator(); i.hasNext(); ) {
for (Map.Entry me : s) {
Object ok = me.getKey();
Object ov = me.getValue();
System.out.print("key=" + ok );
System.out.println(", value=" + ov );
and i'm getting the following errors when I run it in Eclipse:
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
     example2 cannot be resolved to a type
     example2 cannot be resolved to a type
     Syntax error, parameterized types are only available if source level is 5.0
     The type Map.Entry is not generic; it cannot be parameterized with arguments <String, String>
     Syntax error, 'for each' statements are only available if source level is 5.0
     at mapa.MapTest.main(MapTest.java:24)Line 24 is:
  example2 ex = new example2( names, extns );I've compiled things with Eclipse before such as Networking programs and they worked fine, not sure whats wrong with this example.
Thanks!

Answer 1

Oops it looks like on that line they are using the Class itself, and they had it renamed to Example2 not MapTest. I changed the code to the following but still getting errros:
package mapa;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
public class MapTest
     Map<String, String> phonebook = new HashMap<String, String>();
    // constructor
    public example2(String n[], String nums[]) {
       for(int i=0; i< n.length; i++)
           phonebook.put( n, nums[i] );
public static void main(String[] args) {
// data
String [] names = { "Lefty", "Guarav", "Wong", "Rupamay" };
String [] extns = { "4873", "4810", "3769", "0" };
// get an instance of this class
MapTest ex = new MapTest( names, extns );
// dump out the map
System.out.println("map: " + ex.phonebook);
// get the mappings
Set<Map.Entry<String,String>> s = ex.phonebook.entrySet();
// iterate over the mappings
// for (Iterator i = s.iterator(); i.hasNext(); ) {
for (Map.Entry me : s) {
Object ok = me.getKey();
Object ov = me.getValue();
System.out.print("key=" + ok );
System.out.println(", value=" + ov );
Exception in thread "main" java.lang.Error: Unresolved compilation problems:
     The constructor MapTest(String[], String[]) is undefined
     ex.phonebook cannot be resolved or is not a field
     Syntax error, parameterized types are only available if source level is 5.0
     The type Map.Entry is not generic; it cannot be parameterized with arguments <String, String>
     ex.phonebook cannot be resolved or is not a field
     Syntax error, 'for each' statements are only available if source level is 5.0
     at mapa.MapTest.main(MapTest.java:24)