针对你的问题“cannot find symbol scanner sc = new scanner(system.in);”,这里有几个问题需要指出和修正: 类名大小写错误: 在Java中,类名通常是首字母大写的。因此,Scanner 类应该大写首字母,即 Scanner 而不是 scanner。 包未导入: 如果在代码中使用了 Scanner 类,但是没有导入相应的包,Java编译器会...
import java.util.*;public class hhh {public static void main(String args[]){System.out.println("请输入若干个数,每输入一个数回车确认");System.out.println("最后输入一个非数字结束输入操作");Scanner reader=new Scanner(System.in);double sum=0;int m=0;while(reader.hasNextDouble()...
Question: > run TempConversion.java:7: error: cannot find symbol Scanner scnr = new Scanner(System.in); symbol: class Scanner location: class Temp Conversion Temp Conversion.java:7: error: cannot find symbol Scanner scnr- new Scanner(System.in); s...
public static void main(String[] args) { Scanner scan = new Scanner(System.in); BreadType breads = new Loaf("Chese Loaf", 15); double price = breads.sellingBread(15.8, 20.2); //!!!這裡報錯了!!! } } //求問為什麼會報錯, 不太懂,謝謝回答...
你好,System 打印语句 和 for循环语句 应该放在类下的某个方法里,而不是直接写在类下边。这是语法错误。
int start = 0;while (start < len) { System.out.println(word);start++;} } public static void main(String[] args){ Scanner scanner = new Scanner(System.in);System.out.print("please input a word: ");String str = scanner.nextLine();Repeat repeat = new Repeat(str);} } ...
4. “Cannot Find Symbol”这是一个非常常见的问题,因为 Java 中的所有标识符都需要在使用之前进行声明。在编译代码时,编译器不理解标识符的含义。您可能会收到“找不到符号”消息的原因有很多:声明时标识符的拼写可能与在代码中使用时的拼写不同。该变量从未被声明。该变量未在声明的同一范围内使用。该类未...
Cannot resolve symbol ‘Scanner’. Cannot resolve method ‘print(java.lang.String)’. Cannot resolve method ‘nextLine()’. ASLAM May 21, 2021, 3:24am 3 i imported Scanner library , number format library but there is appear red underling breaker on Scanner and So on tahir_074 May 22, ...
import java.util.Scanner; public class Program { public static void main(String[] args) { Scanner sc = new Scanner (System.in); String n = sc.nextLine(); int a = n.length(); String [] z = {A,a,B,b,C,c,D,d,E,e,F,f,g,G,H,h,I,i,J,j,K,k,L,l,M,m,N,n,O,...
建立一个Student类 class Student{ public String a;public int b;public Student(String a, int b){ this.a = a ;this.b = b;} /*如果需要别的其他功能在写方法*/ }