• 2021-04-14
    读代码:
    1.packagefoo;
    2.importjava.util.Vector;
    3.privateclassMyVectorextendsVector{
    4.inti=1;
    5.publicMyVector(){
    6.i=2;
    7.}
    8.}
    9.publicclassMyNewVectorextendsMyVector{
    10.publicMyNewVector(){
    11.i=4;
    12.}
    13.publicstaticvoidmain(Stringargs[]){
    14.MyVectorv=newMyNewVector();
    15.}
    16.}
    结果是:
  • 举一反三