package com.suiwei;
import java.text.ParseException;
import java.util.HashMap;
import java.util.Set;
public class B {
public static void main(String[] args) throws ParseException {
HashMap<String, HashMap<String, Integer>> map = new HashMap<String, HashMap<String,Integer>>();
HashMap<String, Integer> map1 = new HashMap<String, Integer>();
map1.put("一班张三", 20);
map1.put("一班李四", 22);
map.put("一班", map1);
HashMap<String, Integer> map2 = new HashMap<String, Integer>();
map1.put("二班张三", 200);
map1.put("二班李四", 222);
map.put("二班", map2);
Set<String> set = map.keySet();
for (String string : set) {
System.out.println(string);
HashMap<String, Integer> mapneibu = map.get(string);
Set<String> set2 = mapneibu.keySet();
for (String string2 : set2) {
System.out.println(string2+"--"+mapneibu.get(string2));
}
}
}
}
输出结果为:
二班
一班
二班李四--222
一班张三--20
一班李四--22
二班张三--200
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