在主方法(main方法)里加上代码:
double length = 4//假如边长为4
Square square = new Square (length)//new一个对象,并将边长参数传进去
double perimeter = square.getPerimeter()//求出周长
double area= square.getArea()//求出面积
//输出:
System.out.println(”周长为:“+perimeter +"\n面积为:"+area)
代码如下:
import java.util.Scannerpublic class App {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in)
char[] characters = {
'Z', 'Y', 'X', 'W', 'V', 'U', 'T', 'S', 'R',
'Q', 'P', 'O', 'N', 'M', 'L', 'K', 'J', 'I',
'H', 'G', 'F', 'E', 'D', 'C', 'B', 'A'
}
String s = scanner.nextLine()
String s2 = ""
for (char ch : s.toCharArray()) {
if (Character.isUpperCase(ch)) {
s2 += characters[ch - 'A']
} else {
s2 += ch
}
}
System.out.println(s2)
}
}
运行结果: