设计模式之简单工厂模式(创建型)

public abstract class Produce{
    public abstract void m1()''
}

public class ConcreteProduct extends Produce{
    public void m1(){}
}

public class Factory{
    
    public static Produce methodA(){
        return new ConcreteProduct();//创建具体产品
        
    };
}

public final static DateFormat getDateInstance();
public final static DateFormat getDateInstance(int style);
public final static DateFormat getDateInstance(int style,Locale
locale);