关于java：找不到char的符号

Cannot find Symbol for char

本问题已经有最佳答案，请猛点这里访问。

学校作业，所以这个代码没有意义。每当我尝试使用一个字符时，我总是会得到这个错误。

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LetsGoShop.java:14: error: cannot find symbol
item = input.nextChar();
^
symbol: method nextChar()
location: variable input of type Scanner
1 error

实际代码如下：

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import java.util.Scanner;

public class LetsGoShop {

public static void main(String[] args) {

java.util.Scanner input = new java.util.Scanner(System.in);

char item ;
int price;
int quantity;

System.out.println(" Enter the name of the item :");
item = input.nextChar();
System.out.println(" Enter the price of said item :");
price = input.nextInt();
System.out.println(" Enter how much of said item you want to buy :");
quantity = input.nextInt();

double total = price * quantity ;
item = Character.toUpperCase(item);

System.out.println(" You owe" +total+" for" +quantity + item);

}

}

我刚开始编码，所以如果答案很明显，我就猜不到了。

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import java.io.*;

public class Citaj {

private InputStream ul; // File that you are reading from
private char c; // Last char that you read
private boolean eof; // end of file

public Citaj (String ime) throws FileNotFoundException // Open
{ ul = new FileInputStream (ime); } // file.

public boolean eofF () { return eof; } // is it end of file?

public char getChF () { // get a next char.
try { int i = ul.read (); return c = (eof = i == -1) ? ' ' : (char)i; }
catch (Exception g) { eof = true; return c = ' '; }
}

public char CharF () { // reading one non-white char.
while (Character.isWhitespace (c = getChF ()));
return !eof ? c : ' ';
}

public String StringF () { // read one string.
String s ="";
while ( Character.isWhitespace (c = getChF ()) && !eof);
if (eof) return"";
s += c;
while (!Character.isWhitespace (c = getChF ()) && !eof) s += c;
eof = false;
return s;
}

public String LineF () { // read one line
String s="";
while ((c = getChF ()) != '
' && !eof) if (c != '
') s += c;
if (s.length () != 0) eof = false;
return s;
}

public void getNLF ()
{ while (c!='
' && !eof) c = getChF (); c = '\0'; }

public byte ByteF () // read one byte
{ String s = StringF (); return !eof ? Byte.parseByte (s) : 0; }

public short ShortF () // read one short
{ String s = StringF (); return !eof ? Short.parseShort (s) : 0; }

public int IntF () // read one int
{ String s = StringF (); return !eof ? Integer.parseInt (s) : 0; }

public long LongF () // read one long
{ String s = StringF (); return !eof ? Long.parseLong (s) : 0; }

public float FloatF () // read one float
{ String s = StringF (); return !eof ? Float.parseFloat (s) : 0; }

public double DoubleF () // read one double
{ String s = StringF (); return !eof ? Double.parseDouble (s) : 0; }

// public boolean BooleanF() // read one boolean
// { String s = StringF (); return !eof ? Boolean.parseBoolean (s) : false; }

// Support for reading from console:

private Citaj () { ul = System.in; } // private constructor

private static Citaj gl = new Citaj ();

public static boolean eof () { return gl.eofF (); } // Variations:
public static char getCh () { return gl.getChF (); } //
public static char Char () { return gl.CharF (); } //
public static String String () { return gl.StringF (); } //
public static String Line () { return gl.LineF (); } //
public static void getNL () { gl.getNLF (); } //
public static byte Byte () { return gl.ByteF (); }
public static short Short () { return gl.ShortF (); }
public static int Int () { return gl.IntF (); }
public static long Long () { return gl.LongF (); }
public static float Float () { return gl.FloatF (); }
public static double Double () { return gl.DoubleF (); }
// public static boolean Boolean() { return gl.BooleanF(); }
}

所以一般来说，只需导入给定的类，并像这样使用它：citaj.char()。你也可以根据自己的喜好重新命名citaj类：)

用input.next()代替input.nextChar()。扫描器不存在nextChar()方法。input.next()将返回一个字符串。

你必须用String item替换char item，用item = item.toUpperCase()替换item = Character.toUpperCase(item)。

也可以在数量和项目之间输入+"" +，以将值与项目分开。