Question

判断Map中字符串key的值是否等于0怎么写

Answer 1

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class CompareToString {
public static void main(String[] args) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("aa", "aa");
map.put("bb", "bb");
map.put("0", "00");
Set<String> set = map.keySet();
Iterator<String> ite = set.iterator();
while (ite.hasNext()) {
String str = (String) ite.next();
if (str.equals("0")) {
System.out.println(map.get(str));
}
}
}
}

把这个拷到你的雷里，就可以了。

Answer 2

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class CompareToString {
public static void main(String[] args) {
Map<String, Object> map = new HashMap<String, Object>();
map.put("aa", "aa");
map.put("bb", "bb");
map.put("0", "00");
Set<String> set = map.keySet();
Iterator<String> ite = set.iterator();
while (ite.hasNext()) {
String str = (String) ite.next();
if (str.equals("0")) {
System.out.println(map.get(str));
}
}
}
}

把这个拷到你的雷里，就可以了。

Answer 3

for each maps in map
if key = 0 then 执行语句