如何在print语句中组合字符串和整数？

Question

我刚开始在大学课程中学习Java。如果/然后声明还没有涵盖，但我想我可以自己试试。我最终发现了一些语法错误，我认为我已经修复了这些错误，但现在当我尝试用整数添加字符串时，似乎会出现操作数错误。

但是，我在最后3个print语句中出现了一个错误，我认为这是因为我试图组合字符串和整数。我怎么解决这个？

package javaapplication2;

import java.util.Scanner;

public class JavaApplication2 {

    public static void main(String [] args) {
        Scanner input = new Scanner(System.in);
        String name;
        double payRate;
        int hours;
        Boolean OTyn;
        int OTy;

        System.out.println("What is your name?");
        name = input.nextLine();
        System.out.println("What is your hourly rate of pay?");
        payRate = input.nextDouble();
        System.out.println("How any hours have you worked?");
        hours = input.nextInt();
        System.out.println("Your boss pays overtime. Answer with true or false.");
        OTyn = input.nextBoolean();
        if (OTyn == true) 
            System.out.println("After how many hours are you paid for overtime?");
            OTy = input.nextInt();
            if (hours > OTy)
                System.out.println("Your weekly pay is " + ((40 * payRate) + (hours - OTy)(payRate * 1.5)));
            else
                System.out.println("Your weekly pay is " + payRate * hours);
        else
            System.out.println("Your weekly pay is " + payRate * hours);
    }
}

Answer 1

我认为您缺少ifs上的{}

if (OTyn == true) { //here
    System.out.println("After how many hours are you paid for overtime?");
    OTy = input.nextInt();
    if (hours > OTy){ // Here doesn need because it is just one line after the if
        System.out.println("Your weekly pay is " + 
                 ((40*payRate) + (hours - OTy)(payRate*1.5))); 
     // (hours - OTy)(payRate*1.5) you are missing an operator between this expressions

    }else{
        System.out.println("Your weekly pay is " + payRate*hours);
    }
} else { //here
    System.out.println("Your weekly pay is " + payRate*hours);
} //and here

另外，对于后面只有一行的IF语句，您不需要{}如下所示：

if ( something )
   System.out.println("Something is true");
else
   System.out.println("Something is false");