public class Test2 {
public static void main(String[] args) {
// TODO 自动生成的方法存根
char e[]= {'h','o','a','s','a'};//字节数组
StringBuffer s1=new StringBuffer();
for(char k:e)
s1.append(k);
/*StringBuffer s1=new StringBuffer();
String e[]= {"heallao","may"};//字符串数组
for(String k:e)
s1.append(k);*/
String s=s1.toString();
int count=0;
for(int k=0;k<s.length();k++) {
if(s.charAt(k)=='a') {
count++;
}
}
System.out.println("字符串"+s+"中a出现"+count+"次");
}
}