小编use*_*192的帖子

我正在尝试计算字符串中特定字符的出现次数,但输出错误.

这是我的代码:

inputString = str(input("Please type a sentence: "))
a = "a"
A = "A"
e = "e"
E = "E"
i = "i"
I = "I"
o = "o"
O = "O"
u = "u"
U = "U"
acount = 0
ecount = 0
icount = 0
ocount = 0
ucount = 0

if A or a in stri :
     acount = acount + 1

if E or e in stri :
     ecount = ecount + 1

if I …

我正在尝试编写一个程序,它会一直询问用户一个整数,直到他们输入一个非整数的值,此时程序停止.

这是我到目前为止:

import java.util.Scanner;
import java.util.ArrayList;

public class InputStats {
    private static Scanner a;

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        ArrayList InputArray = new ArrayList();
        Boolean Running = true;
        System.out.println("Please type an integer. To stop enter a non integer value");
        while (Running) {
            a = Scanner.nextLine();
            if (!a.hasNextInt()) {
                Running = false;
            }
            else {
                InputArray.add(input.nextLine());

        }

            System.out.println(InputArray);
        }

    }
}

但是,使用此代码我收到错误:

error: non-static method nextLine() cannot  be referenced from a static context (for the …

代码为什么会这样

print("Average =" (sum/count))

产生类型错误而不是语法错误,看到逗号丢失了吗？

谢谢.

我试图从每个元素之间具有不同宽度的元组输出字符串.

这是我目前使用的代码:

b = tuple3[3] + ', ' + tuple3[4] + '          ' + tuple3[0] + ' ' 
+ tuple3[2] + '          ' + '£' + tuple3[1]

print(b)

比方说,我输入这些文本行:

12345 1312 Teso Billy Jones
12344 30000 Test John M Smith

输出将是这样的:

Smith, John M          12344 Test          £30000
Jones, Billy          12345 Teso          £1312

如何保持填充与3个部分之间较大的间距一致？

此外,当我直接从文本文件输入这些字符串时,这是我收到的输出:

  Smith
, John M          12344 Test          £30000
Jones, Billy          12345 Teso          £1312

我该如何解决这个问题？

非常感谢.

我正在尝试创建一个函数,该函数使用类型为BasicAsteroid的(x,y,velocity x,velocity y)值生成随机小行星,这是创建随机小行星的构造函数和函数:

private double x, y;
private double vx, vy;

public BasicAsteroid(double x, double y, double vx, double vy) {
    this.x = x;
    this.x = y;
    this.vx = vx;
    this.vy = vy;
}

public static BasicAsteroid makeRandomAsteroid() {
    Random rand = new Random();
    BasicAsteroid x = new BasicAsteroid((rand.nextInt()%FRAME_WIDTH), (rand.nextInt()%FRAME_HEIGHT), (rand.nextInt()%MAX_SPEED), (rand.nextInt()%MAX_SPEED));
    System.out.println(x);
    return x;
}

然而,这是我创建小行星时的输出:

game1.BasicAsteroid@6773120a

game1.BasicAsteroid@4261b6b3

game1.BasicAsteroid@2673b915

game1.BasicAsteroid@113eb90b

game1.BasicAsteroid@1abcc522

如何输出值而不是类@saskcode？

谢谢.