如何調用？怎麼做？ public class Test {
public static void main(String[] args) {
Test test = new Test();
Animal a = new Animal("Animal");
Dog d = new Dog(" BigDog ","yellow");
晚上好，我在博客it's NOT safe to replace a StringBuffer object with a StringBuilder in java version earlier than 1.5中閱讀了這些聲明，這似乎是一個事實，但沒有明顯的理由！我知道StringBuffer是擴展類java.lang.AbstractStringBuilder。 StringBuilder
晚上好，請你看看，以證明有資格爲GC對象的數目此代碼示例：我看到有四個對象時做這符合GC public class CardBoard {
Short story = 5;
CardBoard go(CardBoard cb) {
cb = null;
return cb;
}
public static void main(String[] args) {
雖然通過SCJP6的考試成績單，我發現這樣的問題： class Clerk implements Runnable {
private Record A, B;
public Clerk(Record a, Record b) {
A = a;
B = b;
}
public void run() {
while(t