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View Compilation Error

0_0_24088548_19441\Main.java:1: 错误: 类kaiya是公共的, 应在名为 kaiya.java 的文件中声明
public class kaiya{
       ^
0_0_24088548_19441\Main.java:4: 错误: 找不到符号
		Scanner sc = new Scanner(System.in);// 获取控制台输入
		^
  符号:   类 Scanner
  位置: 类 kaiya
0_0_24088548_19441\Main.java:4: 错误: 找不到符号
		Scanner sc = new Scanner(System.in);// 获取控制台输入
		                 ^
  符号:   类 Scanner
  位置: 类 kaiya
0_0_24088548_19441\Main.java:8: 错误: 找不到符号
			Map<String, Integer> map = new HashMap<String, Integer>();
			^
  符号:   类 Map
  位置: 类 kaiya
0_0_24088548_19441\Main.java:8: 错误: 找不到符号
			Map<String, Integer> map = new HashMap<String, Integer>();
			                               ^
  符号:   类 HashMap
  位置: 类 kaiya
5 个错误


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