"Java exception has occurred" error while running PostgreSQL JDBC driver

Here's my problem:

1 - I'm using the Postgre 9.6 database.

2 - I downloaded and opened in ECLIPSE a project with Java application example with the use of Hibernate and Postgre that the teacher created (that is, the code is correct) I put the Postgre JDBC driver jar, version: 4.2.0.0 in Eclipse on the "Java Build Path".

3 - The version of Jdk that is installed and linked to Eclipse is 1.7.0_80 which I thought would be compatible with Postgre and the above JDBC driver.

The error: When running the application, Eclipse has errors:

Exception in thread "main" java.lang.UnsupportedClassVersionError: br/com/bd2/teste/TesteDatabase : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

And the JVM opens an alert window with this message: "A Java Exception has ocurred!"

Below are the prints:

EclipseErrors:Theprojectinquestionisthe"Hibernate Example":

Andthisisthecodeformymainclass:

packagebr.com.bd2.teste;importjavax.persistence.EntityManager;importjavax.persistence.EntityManagerFactory;importjavax.persistence.Persistence;importjavax.persistence.TypedQuery;importbr.com.bd2.exemplo.model.Fruteira;publicclassTesteDatabase{publicstaticvoidmain(String[]args){//Inicializacaodafabricadeobjetos//persistenceUnitName="bd2", ou seja, relaciona com a conexao na
        // persistence.xml (podera ter "n" unidades de persistencia)
        EntityManagerFactory emf = Persistence.createEntityManagerFactory("bd2_persistence_unit");
        EntityManager em = emf.createEntityManager();

        // Os comandos a seguir devem ser executados "um por vez"
        // Inserindo...
        em.getTransaction().begin();
        em.persist(new Fruteira("Fruteira"));
        em.persist(new Fruteira("Fruteira 3"));
        em.getTransaction().commit();

        // Atualizando...
        // Buscara a fruteira com id = 1. Observe o numero do id pelo pgAdmin3!
        Fruteira fruteira = em.find(Fruteira.class, 1L); 
        if (fruteira != null) {
            em.getTransaction().begin();
            fruteira.setNome("Fruteira Legal");
            em.merge(fruteira);
            em.getTransaction().commit();
        }
        // Recuperando "n" objetos...
        TypedQuery<Fruteira> q = em.createQuery("SELECT f " +
                                                "FROM Fruteira f", Fruteira.class);
        for (Fruteira each : q.getResultList()) {
            System.out.println(each.toString());
        }       

        // Excluindo...
        // Buscara a fruteira com id = 1. Observe o numero do id pelo pgAdmin3!
        fruteira = em.find(Fruteira.class, 1L); 
        if (fruteira != null) {
            em.getTransaction().begin();
            em.remove(fruteira);
            em.getTransaction().commit();
        }

        // Recuperando "n" objetos...
        q = em.createQuery("FROM Fruteira f", Fruteira.class);
        for (Fruteira each : q.getResultList()) {
            System.out.println(each.toString());
        }

        System.exit(0);
    }