统计字符串中的每个字母出现次数
实现:
public class Test {
public static void main(String[] args) {
String str = "axnajjnccka";
//字符串转字符数组
char []a = str.toCharArray();
char []b =a;
System.out.println(a);
//遍历字符数组
for (int i = 0; i < b.length; i++) {
int key = 0;
//逐个比较字符
for (int j = 0; j < b.length; j++) {
if(a[i] == b[j]) {
key++;
}
}
System.out.println(a[i]+"("+key+")");
}
}
}
结果: