.从键盘录入一个字符串并统计指定字符串出现的次数

Posted 2020-10-27 因为你，我爱上了那抹蓝

public class Demo3{
     public static void main(String [] args){
            int num = 0;
		int t = 0;
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入一个字符串:");
		//存储键盘录入的字符串
		String n = sc.next();
		System.out.println("请输入需要查找的字符:");
		String s = sc.next();
		String [] Str = n.split(s);
		System.out.println(Str.length-1);
    }
}        

　　

public class Demo3 {

	public static void main(String[] args) {
                 int num = 0;
		int t = 0;
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入一个字符串:");
		//存储键盘录入的字符串
		String n = sc.next();
		System.out.println("请输入需要查找的字符:");
		String s = sc.next();
		for(int i=0;i<n.length();i++){
			 t = n.indexOf(s,i);
			if(t!=-1){
				num++;
				i=t;
			}
		}	
		System.out.println(num);
    }
}