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import java.util.ArrayList; | |
public class HelloWorld{ | |
private int max; | |
private ArrayList<String> lista; | |
public static int MAX = 10; | |
public HelloWorld(int max) throws Exception { | |
if(max > 0 && max < MAX) { | |
this.max = max; | |
lista = new ArrayList(); | |
} else { | |
throw new Exception("argumento invalido"); | |
} | |
} | |
public int adicionaNaLista(String item) throws Exception { | |
if(lista.size() < max) { | |
lista.add(item); | |
return lista.size(); | |
} else throw new Exception("alcancou o maximo"); | |
} | |
public static void main(String []args){ | |
System.out.println("Hello World"); | |
try { | |
HelloWorld teste = new HelloWorld(3); | |
System.out.println("adicionando. a lista agora tem " + teste.adicionaNaLista("um") + " itens"); | |
System.out.println("adicionando. a lista agora tem " + teste.adicionaNaLista("dois") + " itens"); | |
System.out.println("adicionando. a lista agora tem " + teste.adicionaNaLista("tres") + " itens"); | |
System.out.println("adicionando. a lista agora tem " + teste.adicionaNaLista("quatro") + " itens"); | |
System.out.println("vai travar..."); | |
} catch(Exception e) { | |
System.out.println("travou"); | |
System.out.println("erro: " + e); | |
} | |
try { | |
HelloWorld teste = new HelloWorld(-1); | |
} catch(Exception e) { | |
System.out.println("travou"); | |
System.out.println("erro: " + e); | |
} | |
try { | |
HelloWorld teste = new HelloWorld(100); | |
} catch(Exception e) { | |
System.out.println("travou"); | |
System.out.println("erro: " + e); | |
} | |
} | |
} |
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