视频内容是关于Java流程控制结构的讲解,包括switch-case语句和它的用法。视频介绍了switch-case中可以使用的数据类型有六种:byte、short、char、int、枚举类型和字符串类型。讲解了switch-case结构,强调了常量的使用和break语句的重要性。同时,还比较了if-else语句、三元运算符和switch-case的不同使用场景,强调了根据不...
double number1 = scanner.nextDouble(); System.out.println("请输入运算符号"); String fuh = scanner.next(); System.out.println("输入我们第二个数字"); double number2 = scanner.nextDouble(); switch (fuh){ case "+": add(number1,number2); break; case "-": jian(number1,number2); break...
(1)java.util.Scanner:是一个扫描仪的类型,是引用数据类型,首字母是大写 其中java.util是包 (2)input是一个变量名,它代表这个扫描仪 (3)new java.util.Scanner(System.in)是给input赋值的,它是一个新的对象 (4)(System.in)是指定了数据的来源,System.in默认代表键盘输入 (5)整个语句中,唯一可以自己修改...
1、导包:import java.util.Scanner; 2、创建Scanner对象:Scanner scanner = new Scanner(System.in); Scanner 变量名 = new Scanner(输入); 变量名可以随便用,经常用input / scanner。 3、调用对象的方法,完成输入:scanner.nextInt();//允许输入数字 .nextLine();//允许输入一行,其实是字符串 .nextDouble();...
import java.util.Scanner; //导包:import java.util.Scanner class ScannerTest{ public static void main(String[] args){ Scanner scan = new Scanner(System.in);//Scanner的实例化 String name = scan.next();//调用Scanner类的相关方法 }
Using Switch with String Variables Starting from Java 7, you can use switch statements with string variables. This can be very useful when you want to perform different actions based on the value of a string. Here’s an example: Stringday='Monday';switch(day){case'Monday':System.out.printl...
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Solution 2: Using Switch-Case Statements Code: importjava.util.Scanner;publicclassSimpleCalculatorSwitchCase{public static void main(String[]args){//Create a ScannerobjectforinputScanner scanner=new Scanner(System.in);//Input first number System.out.print("Enter the first number: ");double num1=...
Java switch expression simplifies the original switch statement. It allows using multiple case labels called arms. Main.java import java.util.Scanner; void main() { System.out.print("Enter a domain: "); try (var sc = new Scanner(System.in)) { ...