求指教 ,cnt[c - 'a']++;这一句是什么意思呢
public class text1 {
public boolean canConstruct(String ransomNote,String magazine) {
if (ransomNote.length() > magazine.length()) {
return false;
}
int[] cnt = new int[26];
for (char c : magazine.toCharArray()) {
cnt[c - 'a']++;
}
for (char c : ransomNote.toCharArray()) {
cnt[c - 'a']--;
if(cnt[c - 'a'] < 0) {
return false;
}
}
return true;
}
public static void main(String[] args){
text1 t = new text1();
Boolean b = t.canConstruct("aaab","aaaabbbc");
System.out.print(b);
}
}