我想知道这段代码干什么?它打印所有TreeSet的几个? 它真的可以用System.out.println打印TreeSet吗?system.out.println(tresset对象)
public static void main(String[] args) {
TreeSet <Moulage> treeSetMoulages = new TreeSet <Moulage>();
Moulage moulage = new Moulage ("REF24", "Cervidé","Bronze");
treeSetMoulages.add(moulage);
moulage = new Moulage ("REF44", "Insigne de chefferie","Bois");
treeSetMoulages.add(moulage);
moulage = new Moulage ("REF63", "Panthere","Marbre");
treeSetMoulages.add(moulage);
moulage = new Moulage ("REF58", "Ours blanc","Marbre");
treeSetMoulages.add(moulage);
moulage = new Moulage ("REF78", "Danseuse","Bronze");
treeSetMoulages.add(moulage);
System.out.println (treeSetMoulages);
}
我如何知道它是否可打印类? – youngknight
@youngknight如果你已经实现了'toString'方法。 System.out.println(object)在对象上调用'toString'方法。 –