Java 布尔值设置为是/否
我正在尝试使用以下参数创建名为loopquery的方法:Java 布尔值设置为是/否,java,methods,boolean,Java,Methods,Boolean,我正在尝试使用以下参数创建名为loopquery的方法: /** create a method named loopquery() * - that returns a boolean value * - accepts no arguments * - content: * - declaration of a boolean variable initialized to false * - an InputDialog that reques
/** create a method named loopquery()
* - that returns a boolean value
* - accepts no arguments
* - content:
* - declaration of a boolean variable initialized to false
* - an InputDialog that requests if you want to loopagain (y,n)and assigns the value to a string variable
* - converts the String variable to upper case
* - changes the value of the boolean variable to true if the string variable has a value of "Y"
* - returns the value of the boolean variable
*/
下面是我对它的看法,但我想我错过了很多。有没有人能帮我满足以上所有要求?这是我的呕吐代码
private static void loopquery() {
String loopquery;
boolean loopagain = true;
loopquery = JOptionPane.showInputDialog(null, "Another table (y.n)",
"Again?", JOptionPane.QUESTION_MESSAGE);
loopquery = loopquery.toUpperCase();
}
有关要求:
- 如果字符串变量的值为“Y”,则将布尔变量的值更改为true
- 返回布尔变量的值
loopagain = loopquery.equals("Y");
return loopagain;
对于要求:
- 初始化为false的布尔变量的声明
boolean loopagain = true;
对于这一个:
boolean loopagain = false;
注:
Java中变量和方法的标准符号是CamelCase,为了遵循标准命名约定,应该分别将“loopquery”和“loopReach”替换为“loopquery”和“loopReach”
if(loopquery.equals("Y"))
return true;
else if (loopquery.equals("N"))
return false;
请记住,必须将方法从void更改为boolean,因为不能在void方法中返回值
问候,
库尔蒂斯
您的基本结构大部分是正确的,但与要求您的要求存在差异:
- 布尔值初始化为
,您将其初始化为false
true
- 它要求返回布尔值,返回类型为
void
loopreach
是“Y”
,它会将loopreach更改为true
,否则它会跳过并返回loopreach作为初始化值,false
private static boolean isLoopQuery()
{
// Declaration of a boolean variable initialized to false
boolean loopAgain = false;
// An InputDialog that requests if you want to loopagain (y,n)and assigns the value to a string variable
String loopQuery = JOptionPane.showInputDialog(null, "Another table (y.n)",
"Again?", JOptionPane.QUESTION_MESSAGE);
// Converts the String variable to upper case
loopQuery = loopQuery.toUpperCase();
// Changes the value of the boolean variable to true if the string variable has a value of "Y"
if(loopQuery.equals("Y"));
{
loopAgain = true;
}
// returns the value of the boolean variable
return loopAgain;
}
希望这有点清楚,并且符合您的每个要求 简而言之,虽然这不是有效的代码:
if(loopquery==“Y”){loopreace=true}else{loopreace=false}
String s=“no”;如果(布尔值)s=“是”
,如标题所示。返回布尔值
您的方法定义可能应该是布尔值
。根据JavaBean命名约定,如果您遵循@MarcB的代码,请确保使用If(loopquery.equals(“Y”)
private static boolean isLoopQuery()
{
// Declaration of a boolean variable initialized to false
boolean loopAgain = false;
// An InputDialog that requests if you want to loopagain (y,n)and assigns the value to a string variable
String loopQuery = JOptionPane.showInputDialog(null, "Another table (y.n)",
"Again?", JOptionPane.QUESTION_MESSAGE);
// Converts the String variable to upper case
loopQuery = loopQuery.toUpperCase();
// Changes the value of the boolean variable to true if the string variable has a value of "Y"
if(loopQuery.equals("Y"));
{
loopAgain = true;
}
// returns the value of the boolean variable
return loopAgain;
}