Bieh

Estou começando a estudar Java e optei por seguir o tutorial que o próprio site oficial oferece (ainda que em Inglês). Em uma das atividades eu deveria construir uma interface para meus objetos, mas não consegui fazê-lo. A falta de um exemplo na resolução do problema também me deixou mais perdido ainda. Enfim, eu uso o NetBeans, e eis o código do que fiz até agora: /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package exercises; /** * * @author ASUS */ interface PessoaInterface { public void changename(String text); public void changeage(int value); } public class Pessoa implements PessoaInterface { String name = ""; int age = 0; public void changename(String text) { name = text; } public void changeage(int value) { age = value; } void print() { System.out.println(name + "is " + age + "years old."); } } public class exercises { Pessoa Ana = new Pessoa(); Pessoa Michel = new Pessoa(); Pessoa Victoria = new Pessoa(); Ana.changename("Ana"); Michel.changename("Michel"); Victoria.changename("Victoria"); Ana.changeage(12); Michel.changeage(17); Victoria.changeage(17); Ana.print(); Michel.print(); Victoria.print(); } Alguém pode me dizer o que fiz de errado? Eu passei um bom tempo procurando mas não entendi o motivo do erro. Aliás, a caixa de saída: Created dir: C:\Users\ASUS\Documents\NetBeansProjects\Exercises\build Updating property file: C:\Users\ASUS\Documents\NetBeansProjects\Exercises\build\built-jar.properties Created dir: C:\Users\ASUS\Documents\NetBeansProjects\Exercises\build\classes Created dir: C:\Users\ASUS\Documents\NetBeansProjects\Exercises\build\empty Created dir: C:\Users\ASUS\Documents\NetBeansProjects\Exercises\build\generated-sources\ap-source-output Compiling 1 source file to C:\Users\ASUS\Documents\NetBeansProjects\Exercises\build\classes C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:38: error: <identifier> expected Ana.changename("Ana"); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:38: error: illegal start of type Ana.changename("Ana"); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:39: error: <identifier> expected Michel.changename("Michel"); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:39: error: illegal start of type Michel.changename("Michel"); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:40: error: <identifier> expected Victoria.changename("Victoria"); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:40: error: illegal start of type Victoria.changename("Victoria"); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:42: error: <identifier> expected Ana.changeage(12); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:42: error: illegal start of type Ana.changeage(12); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:43: error: <identifier> expected Michel.changeage(17); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:43: error: illegal start of type Michel.changeage(17); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:44: error: <identifier> expected Victoria.changeage(17); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:44: error: illegal start of type Victoria.changeage(17); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:46: error: <identifier> expected Ana.print(); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:47: error: <identifier> expected Michel.print(); C:\Users\ASUS\Documents\NetBeansProjects\Exercises\src\exercises\exercises.java:48: error: <identifier> expected Victoria.print(); 15 errors C:\Users\ASUS\Documents\NetBeansProjects\Exercises\nbproject\build-impl.xml:929: The following error occurred while executing this line: C:\Users\ASUS\Documents\NetBeansProjects\Exercises\nbproject\build-impl.xml:269: Compile failed; see the compiler error output for details. FALHA NA CONSTRUÇÃO (tempo total: 31 segundos)