如何将未知数量的参数传递给字符串数组。简而言之,我需要对此进行概括:
private String[] contactsFirstNameData = new String[] {
"Emerson", "Lake", "Palmer"
};
所以我可以这样表达或类似
:LinkedList<String> l = new LinkedList<>();
l.add("Emerson"); l.add("Lake"); l.add("Palmer");
private String[] contactsFirstNameData = new String[] {
//Some function to pass l's elements
}
String[] contactsFirstNameData = l.toArray(String[]::new);
如果您的字段static final
,您可以在静态块中初始化它:-
private static final String[] contactsFirstNameData;
static {
LinkedList<String> l = new LinkedList<>();
l.add("Emerson");
l.add("Lake");
l.add("Palmer");
contactsFirstNameData = l.toArray(String[]::new);
}
如果它只是final
而不是静态的,你可以使用构造函数:-
private final String[] contactsFirstNameData;
public MyClass() {
LinkedList<String> l = new LinkedList<>();
l.add("Emerson");
l.add("Lake");
l.add("Palmer");
contactsFirstNameData = l.toArray(String[]::new);
}