?? single.java
字號:
public class Single{
private static final Single INSTANCE = new Single();
private Single(){}
public static Single getInstance(){
return INSTANCE;
}
public void methodA(){
System.out.println("Call method A");
}
public static void main(String args[]){
Single sg1 = Single.getInstance();
Single sg2 = Single.getInstance();
sg1.methodA();
sg2.methodA();
System.out.println(sg1==sg2);
}
}
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