public class NameList
{
private List names = new ArrayList();
public synchronized void add(String name)
{
names.add(name);
}
public synchronized void printAll() {
for (int i = 0; i < names.size(); i++)
{
System.out.print(names.get(i) + ””);
}
}
public static void main(String[]args)
{
final NameList sl = new NameList();
for (int i = 0; i < 2; i++)
{
new Thread()
{
public void run()
{
sl.add(“A”);
sl.add(“B”);
sl.add(“C”);
sl.printAll();
}
} .start();
}
}
}
An exception may be thrown at runtime.
The code may run with no output, without exiting.
The code may run with no output, exiting normally(正常地).
The code may rum with output “A B A B C C “, then exit.
The code may rum with output “A B C A B C A B C “, then exit.
The code may ruin with output “A A A B C A B C C “, then exit.
The code may ruin with output “A B C A A B C A B C “, then exit.
