具有成对的静态数组值的Java类
具有成对的静态数组值的Java类
提问于 2012-03-06 11:49:09
我正在创建一个特定的类，使用
MyClass class1 = new MyClass(ClassA.StaticSet1, ClassA.StaticCoef1);
MyClass class2 = new MyClass(ClassB.StaticSet1, ClassB.StaticCoef1);因此，我希望将所有这些静态值收集到一个类中，并使用以下内容调用它们
MyClass class1 = new MyClass(TopClass.Obj1);
MyClass class2 = new MyClass(TopClass.Obj2);其中Obj1和Obj2是包含上述值对的静态实体。
我能做的最接近的事情就是在TopClass中创建静态类并扩展一个基类，所以我得到了这个丑陋的实现
Public class TopClass{
public static class Base{
public String set[];
public double coef[];
public Base(s, c){
set = s;
coef = c;
}
}
public static class Obj1 extends Base{
public static String set[] = {"a","b","C"};
public static double coef[]= {1,2,3};
public Obj1(){
super(set, coef);
}
}
public static class Obj2 extends Base{
public static String set[] = {"x","y","z"};
public static double coef[]= {11,12,13};
public Obj2(){
super(set, coef);
}
}
}然后我会打电话给他们
Myclass class1 = new MyClass((TopClass.Base)(new TopClass.Obj1());
Myclass class2 = new MyClass((TopClass.Base)(new TopClass.Obj2());但这并不是我真正想要的，因为这个类变得很麻烦，特别是我将创建许多这样的条目。如果您有任何见解，我们将非常感谢:)
谢谢,
哈尼族
Stack Overflow用户
回答已采纳
发布于 2012-03-06 12:21:11
这将是一个使用工厂模式的好地方。可能是这样的：
public class SetCoefProvider {
private String[] set;
private double[] coef;
public SetCoefProvider(String[] set, double[] coef) {
this.set = set;
this.coef = coef;
}
public String[] getSet() {
return set;
}
public double[] getCoef() {
return coef;
}
}
public class SetCoefProviderFactory {
public static SetCoefProvider createObj1Provider() {
return new SetCoefProvider(new String[] {"a", "b", "c"}, new double[] {1,2,3});
}
public static SetCoefProvider createObj2Provider() {
return new SetCoefProvider(new String[] {"x", "y", "z"}, new double[] {11,12,13});
}
}然后，如果你真的想让它们成为单例，你总是可以这样做：
public class SingletonSetCoefProviders {
private static SetCoefProvider obj1Provider, obj2Provider;
static {
obj1Provider = SetCoefProviderFactory.createObj1Provider();
obj2Provider = SetCoefProviderFactory.createObj2Provider();
}
public static SetCoefProvider getObj1Provider() {
return obj1Provider;
}
public static SetCoefProvider getObj2Provider() {
return obj2Provider;
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/9577640
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