这个是我自己写的

[Java] 纯文本查看 复制代码

package com.itheima.homework;

import java.util.Scanner;

/*1.键盘录入一个大字符串,再录入一个小字符串
2.统计小字符串在大字符串中出现的次数
3.代码运行打印格式:
	请输入大字符串:javajava I love java l like jajavava I enjoy javajavajava
	请输入小字符串:heima
	控制台输出:小字符串heima,在大字符串woaiheima,heimabutongyubaima,wulunheimahaishibaima,zhaodaogongzuojiushihaoma中共出现3次*/
public class HomeWork02 {
	public static void main(String[] args) {
		//创建键盘录入
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入一个大字符串:");
		String s1 = sc.nextLine();
		System.out.println("请输入一个小字符串:");
		String s2 = sc.nextLine();
		
		int count = 0;
		for (int i = 0; i <= s1.length()-s2.length(); i++) {
			String s3 = s1.substring(i,s2.length() + i);
			
			if (s2.equals(s3)) {
				count++;
			}
		}
		
		System.out.println("小字符串" + s2 + ",在大字符串" + s1 + "中共出现" + count + "次");
	}
}

下面是老师写的

[Java] 纯文本查看 复制代码

package com.itheima.tests;

import java.util.Scanner;

/*1.键盘录入一个大字符串,再录入一个小字符串
2.统计小字符串在大字符串中出现的次数
3.代码运行打印格式:
		请输入大字符串:javajava I love java l like jajavava I enjoy javajavajava
		请输入小字符串:heima
		控制台输出:小字符串heima,在大字符串woaiheima,heimabutongyubaima,wulunheimahaishibaima,zhaodaogongzuojiushihaoma中共出现3次
*/
public class Test03 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入大字符串:");
		String l = sc.nextLine();
		System.out.println("请输入小字符串:");
		String s = sc.nextLine();
		
		int count = getCount(l, s);
		System.out.println(count);
	}
	
	//遍历大字符,
	public static int getCount(String l, String s) {
		int count = 0;
		int index = 0;
		while ((index = l.indexOf(s)) != -1) {
			count++;
			l = l.substring(index + 1);
		}
		return count;
	}
}

这个是我自己写的

[Java] 纯文本查看 复制代码

package com.itheima.homework;

import java.util.Scanner;

/*1.键盘录入一个大字符串,再录入一个小字符串
2.统计小字符串在大字符串中出现的次数
3.代码运行打印格式:
	请输入大字符串:javajava I love java l like jajavava I enjoy javajavajava
	请输入小字符串:heima
	控制台输出:小字符串heima,在大字符串woaiheima,heimabutongyubaima,wulunheimahaishibaima,zhaodaogongzuojiushihaoma中共出现3次*/
public class HomeWork02 {
	public static void main(String[] args) {
		//创建键盘录入
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入一个大字符串:");
		String s1 = sc.nextLine();
		System.out.println("请输入一个小字符串:");
		String s2 = sc.nextLine();
		
		int count = 0;
		for (int i = 0; i <= s1.length()-s2.length(); i++) {
			String s3 = s1.substring(i,s2.length() + i);
			
			if (s2.equals(s3)) {
				count++;
			}
		}
		
		System.out.println("小字符串" + s2 + ",在大字符串" + s1 + "中共出现" + count + "次");
	}
}

下面是老师写的

[Java] 纯文本查看 复制代码

package com.itheima.tests;

import java.util.Scanner;

/*1.键盘录入一个大字符串,再录入一个小字符串
2.统计小字符串在大字符串中出现的次数
3.代码运行打印格式:
		请输入大字符串:javajava I love java l like jajavava I enjoy javajavajava
		请输入小字符串:heima
		控制台输出:小字符串heima,在大字符串woaiheima,heimabutongyubaima,wulunheimahaishibaima,zhaodaogongzuojiushihaoma中共出现3次
*/
public class Test03 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		System.out.println("请输入大字符串:");
		String l = sc.nextLine();
		System.out.println("请输入小字符串:");
		String s = sc.nextLine();
		
		int count = getCount(l, s);
		System.out.println(count);
	}
	
	//遍历大字符,
	public static int getCount(String l, String s) {
		int count = 0;
		int index = 0;
		while ((index = l.indexOf(s)) != -1) {
			count++;
			l = l.substring(index + 1);
		}
		return count;
	}
}