招商银行校园招聘笔试题

main程序输出: class Test { private static Test t = null; int i; private Test() { i = 90; } public static Test getInstance() { if (t == null) { t = new Test(); } return t; } public static void main(String[] args) { Test t1 = Test.getInstance(); System.out.println(t1.i); t1.i = t1.i + 20; Test t2 = Test.getInstance(); System.out.println(t1.i); } }