这是一个基本问题。我正在使用iterator
迭代地图,我有一个双变量m_asim
。我需要知道如何比较map的值和double变量?
我的代码:
for(Map mp:dblist){
Iterator it = mp.entrySet().iterator();
while (it.hasNext()) {
Map.Entry pair = (Map.Entry)it.next();
System.out.println(pair.getKey() + " = " + pair.getValue());
//Need to know how to compare in next line
if(pair.getValue() >= m_asim) // this line give me error
{}
it.remove();
}
}
错误:
operator > is undefined for the argument type(s) Object,double
答案 0 :(得分:1)
您可以采用的方法是使用泛型声明Map和Iterator。这样,条目值将被输入为double。
假设Map有一个字符串键和一个double值,你可以这样做:
Iterator<Entry<String, Double>> it = mp.entrySet().iterator();
while (it.hasNext()) {
Map.Entry<String, Double> pair = it.next();
System.out.println(pair.getKey() + " = " + pair.getValue());
//Need to know how to compare in next line
if(pair.getValue() >= m_asim) // this line give me error
{}
it.remove();
}