nextDouble错误符号：方法nextDouble

Question

symbol：method nextDouble

nextDouble＆＃34;错误＆＃34;

任何人都可以帮我解决这个问题吗？

    double fahrenheit;

    String input = JOptionPane.showInputDialog(null, "Enter the Fahrenheit degre : ");

    fahrenheit = input.nextDouble();

    double Celsius = 5/9 * (fahrenheit-32);

    JOptionPane.showMessageDialog(null, " in Celsius : " + Celsius);

Answer 1

您将String与java.util.Scanner混为一谈。解析从showInputDialog

返回的字符串

fahrenheit = Double.parseDouble(input);