JAVA筆試:一道綜合考察題(內部類,傳值呼叫,多型)
阿新 • • 發佈:2018-12-26
public class Tree {
private static String tree = "tree";
String getTree() {
return tree;
}
public static class Elm extends Tree {
private static String tree = "elm";
public static void main(String[] args) {
new Elm().go(new Tree());
}
void go(Tree t) {
String s = t.getTree() + Elm.tree + tree + (new Elm().getTree());
System.out.println(s);
}
}
}
A. elm elm elm elm
B. tree elm elm elm
C. tree elm elm tree
D. elm elm tree elm
正確答案:C