java - 无法创建 while/boolean 循环

Question

我是java菜鸟。我正在尝试创建一个 while 循环，该循环将在每个进程后提示用户；至于他们是否愿意继续。我的进度是这样的。

    String proString,answer;
    char t,f,x;
    boolean exitTime;
    exitTime = false;
    proString = " Would You Like To Continue? \n";
    while(!exitTime) {
        continue;
    }
    answer = JOptionPane.showInputDialog(null," Would You Like To Continue? T/F ",HEADING,JOptionPane.INFORMATION_MESSAGE);
    x = char.parseChar(answer);

我也尝试了以下方法，但没有成功...

    Prompt= JOptonPane.showInputDialog(null,proString,HEADING,JOptionPane.QUESTION_MESSAGE); 
    input = char.parseChar(Prompt);
    if(input == "y") {
        break;
    }
    else if(input == "n") {
    }
    input = char.parseChar(Prompt);
    if(input != "y"||"n") {
        JOptionPane.showMessageDialog(null,"Invalid Input", "Error", JOptionPane.INFORMATION_MESSAGE);
    }
    else {
    }

我想我的问题归结为我应该使用 JOptionPane.showInputDialog(...) 或 JOptionPane.showConfirmDialog(...) 还是其他方法？请告诉我你会如何做到这一点。

Answer 1

您需要的是使用 do-while 循环:

//assume user does not want to continue.
boolean continue = false;
do
{
//process whatever you want

//ask the user
Prompt= JOptonPane.showInputDialog(null,proString,HEADING,JOptionPane.QUESTION_MESSAGE);
input = char.parseChar(Prompt);
//wait until you get a valid input
while(input != "y"||"n")
{
JOptionPane.showMessageDialog(null,"Invalid Input", "Error",JOptionPane.INFORMATION_MESSAGE);
Prompt= JOptonPane.showInputDialog(null,proString,HEADING,JOptionPane.QUESTION_MESSAGE); 
input = char.parseChar(Prompt);
}
//if user wants to continue, change your flag to true
if(input == "y") {
    continue = true;
}
//otherwise make it false
else if(input == "n") {
    continue = false;
}
while(continue); //if continue is true loop back

我还没有测试过它，但它应该可以向您解释逻辑。