java - 运行扫描仪程序

Question

我正在尝试编写一个程序，该程序基本上可以读取 1,000 到 999,999 之间的任何整数，然后用逗号分隔千位来显示它。到目前为止我已经有了这个，而 eclipse 不喜欢它。为什么？

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
public static void main (String[] args) throws java.lang.Exception
{
// Scanner scan = new scanner(system.in);
double value, integer;
System.out.println("Enter your value without a comma");
integer = scan.nextdouble();
System.out.println(integer,);
scan.close();

Answer 1

代码中有很多错误，这就是 Eclipse 不喜欢它的原因;)

仅举几例:

• 新扫描仪 -> 大写 S 扫描仪
• system.in -> 与系统相同

看看下面的这段代码，它会运行得很好:)

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone {

public static void main(String[] args) throws java.lang.Exception {

    Scanner scan = new Scanner(System.in);

    double value, intValue;

    System.out.println("Enter your value without a comma");

    intValue = scan.nextDouble();

    System.out.println(intValue);

    scan.close();
}