五个Java初学者练习题与解决方案

如果您已经学习了Java的基础知识，那么现在正是解决一些实践问题的好时机。练习和解决问题将帮助您掌握 Java 编程语言并将您的技能提升到一个新的水平。

我整理了一些可以用于练习的 Java 编码问题。我还提供了 Java 代码解决方案和相应的输出供您参考。

1. Java程序检查给定数字是偶数还是奇数

import java.util.Scanner;

class Main {
  public static void main(String[] args) {

    System.out.println("Enter a number: ");
    Scanner sc = new Scanner(System.in);
    int number =Integer.parseInt(sc.nextLine());
    int x = number%2;
    
    if(x==0){
      System.out.println("The number is Even");
    }
    else{
      System.out.println("The number is Odd");
    }
    
  }
}

输出：

2. 将摄氏温度转换为华氏温度的Java程序

import java.util.Scanner;

class Main {
  public static void main(String[] args) {

    System.out.println("Enter temperature in Centigrade: ");
    Scanner sc = new Scanner(System.in);
    int c =Integer.parseInt(sc.nextLine());
    float f = ((9*c)/5)+32;
    
    System.out.println("Temperature in Fahrenheit is: "+f);
    
  }
}

输出：

3. Java 程序求给定三个边的三角形面积

import java.util.Scanner;

class Main {
  public static void main(String[] args) {

    Scanner sc= new Scanner(System.in);
        
         System.out.println("Enter the 1st side:");
         int a= sc.nextInt();
 
         System.out.println("Enter the 2nd side:");
          int b= sc.nextInt();
 
         System.out.println("Enter the 3rd side:");
         int c= sc.nextInt();
    
         if((a+b)>c && (a+c)>b && (b+c)>a)
          {
            double s=(a+b+c)/2.0;
            double area=Math.sqrt(s*(s-a)*(s-b)*(s-c));
            System.out.println("Area of Triangle is: " + area);    
           }
         else  
           System.out.println("Area of the triangle does not exist");
    
  }
}

输出：

4. Java程序求一组整数的平均值

import java.util.Scanner;

class Main {
  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    System.out.println("Enter the count of numbers: ");
    int count = Integer.parseInt(sc.nextLine());
    int i = 0;
    float sum = 0;
    for(i=0;i<count;i++){
      System.out.println("Enter an integer: ");
      int x = Integer.parseInt(sc.nextLine());
      sum = sum + x;
    }
  
    float avg = sum/count;
    System.out.println("The average is: "+avg);
    
  }
}

输出：

5. Java 程序求一组实数的乘积

import java.util.Scanner;

class Main {
  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    System.out.println("Enter the number of real numbers: ");
    int count = Integer.parseInt(sc.nextLine());
    int i = 0;
    float product = 1.0f;
    for(i=0;i<count;i++){
      System.out.println("Enter a real number: ");
      float x = Float.parseFloat(sc.nextLine());
      product = product * x;
    }
  
    System.out.println("The product of the numbers is: "+product);
    
  }
}

输出：

以上就是极悦小编介绍的"五个Java初学者练习题与解决方案"，希望对大家有帮助，如有疑问，请在线咨询，有专业老师随时为您务。