招聘试题 3
1.选择题(4′×10)：
例题 1.(d)
class Parent{
public void method1(){ //change here
System.out.println("Parent's method1()");
}
public void method2()
{
System.out.println("Parent's method2()");
method1();
}
}
class Child extends Parent{
public void method1(){
System.out.println("Child's method1()");
}
public static void main(String args[]){
Child p = new Child();//change here
p.method2();
}
}
Choices:
a. Compile time error
b. Run time error
c. prints : Parent's method2()
Parent's method1()
d. prints : Parent's method2()
Child's method1()
例题 2：
How can you force garbage collection of an object?
A. Garbage collection cannot be forced
B. Call System.gc().
C. Call System.gc(), passing in a reference to the object to be garbage
collected.
D. Call Runtime.gc().
E. Set all references to the object to new values（null, for example）.
例题 3：
Consider the following class:
1. class Test(int i) {
2. void test(int i) {
