class TestReference{ public static void main(String[] args){ int x=2; TestReference tr = new TestReference(); System.out.print(x); tr.change(x); System.out.print(x); } public void change(int num){ num = num + 1; } } 程序运行后的输出是哪项()? A、
题目
class TestReference{ public static void main(String[] args){ int x=2; TestReference tr = new TestReference(); System.out.print(x); tr.change(x); System.out.print(x); } public void change(int num){ num = num + 1; } } 程序运行后的输出是哪项()?