获取用户输入的值并将其显示在其他预选文本中。JAVA

所以我们刚在大学计算机科学入门课上开始学习java。我们必须修改代码以显示“如果里氏震级为（用户输入值）”（答案由用户输入确定）我对编程一无所知，所以我在这方面遇到了麻烦。所以基本上，它需要抓取用户在对话框中输入的数字，并在这两段文本之间打印出来。我们使用BlueJ编码。我们运行程序，然后在终端中打开答案

这是需要编辑的代码：

/**
* Write a description of class Earthquake here.
*
* A class that describes the effects of an earthquake.
* @author Michael Gerhart
* @version Version 1.0, 4/22/2013
*/
public class Earthquake
{
// instance variables
private double richter;
/**
* Constructor for objects of class Earthquake
* @param magnitude the magnitude on the Richter scale
*/
public Earthquake(double magnitude)
{
// initialise instance variable richter
richter = magnitude;
}
/**
* Gets a description of the effect of the earthquake.
*
* @return the description of the effect
*/
enter code here`public String getDescription(double magnitude)
{
String r;
if (richter >= 8.0)
r = "Most structures fall";
else if (richter >= 7.0)
r = "Many buildings destroyed";
else if (richter >= 6.0)
r = "Many buildings considerably damaged; "
+ "some collapse";
else if (richter >= 4.5)
r = "Damage to poorly constructed buildings";
else if (richter >= 3.5)
r = "Felt by many people, no destruction";
else if (richter >= 0)
r = "Generally not felt by people";
else
r = "Negative numbers are not valid";
return r;
}
}

这是运行程序的代码：

import javax.swing.JOptionPane;
/**
* Write a description of class EarthquakeTest here.
*
* A class to test the Earthquake class.
*
* @author Michael Gerhart
* @version 4/22/2013
*/
public class EarthquakeTest
{
public static void main(String[] args)
{
String input = JOptionPane.showInputDialog("Enter a magnitude on the Richter scale:");
double magnitude = Double.parseDouble(input);
Earthquake quake = new Earthquake(magnitude);
String quakeDamage = quake.getDescription(magnitude);
System.out.println(quakeDamage);
System.exit(0);
}
}

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对我来说，理解你的要求有点困难，但如果我理解正确，你需要显示这样的内容，“如果震级是3.8，很多人都能感觉到，没有破坏。”在这种情况下，你就快到了；你只需要使用字符串连接。就像将两个字符串组合在一起形成一个字符串

quakeDamage已经保存了第二个文本块（在本例中为“许多人感觉到，没有破坏”）。您需要另一个字符串变量来保存最终结果。请尝试以下操作：

String result = "If the magnitude is " + magnitude + ", " + quakeDamage;
System.out.println(result);

这样就可以打印出整个文本

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顺便说一下，在你做了一点实验之后，你可能想编辑地震课中定义的文本，使它看起来更漂亮一些。注意“感觉”中的大写字母会出现在句子的中间。