我正在练习一些面试问题,但不知道如何比较hashMap值.前提是您有一本带弦的杂志.您必须从杂志中切出适当数量的字符以形成赎金字样.我已经设法将字符和字符的出现次数添加到hashMap中,但是如何比较两个hashMap以确定我有足够的字母.任何指导都将不胜感激.
杂志= {g = 2,= 14,d = 2,e = 2,a = 4,n = 1,o = 5,l = 4,m = 1,.= 1,k = 1,I = 2, h = 2,i = 6,w = 1,T = 1,u = 1,t = 2,s = 3,r = 1,y = 2}
赎金= {w = 1,= 3,o = 1,l = 4,k = 1,I = 1,y = 1,i = 2}
String mag = "this is what I said Im going to do. i really like you a lot";
String ransom = "i will kill you";
Map map = new HashMap();
Map ransomMap = new HashMap();
for(int i = 0; i < mag.length() -1; i++)
{
char c = mag.charAt(i);
if(!map.containsKey(c))
map.put(c, 1);
else{
int value = map.get(c);
map.put(c,++value);
}
}
System.out.println(map);
for(int i = 0; i < ransom.length()-1; i++ )
{
char c = ransom.charAt(i);
if(!ransomMap.containsKey(c))
ransomMap.put(c,1);
else
{
int value = (ransomMap.get(c));
ransomMap.put(c,++value);
}
}
System.out.println(ransomMap);
}
