对不起,如果这是一个愚蠢的问题,但我完全是新手,只是尝试我的手。 我的代码卡住....在此之后,程序结束,无论是选择1还是2。我知道它的一些简单的东西我不知道......任何输入都值得赞赏我复制并粘贴了我认为问题所在的部分。
System.out.println("Is this information correct? Enter 1 if it is correct, and 2 to change");
Scanner inputCorrect = new Scanner(System.in);
int pick = inputCorrect.nextInt();
boolean isCorrect = false;
while (isCorrect = false){
while (!(pick == 1) && (!(pick ==2)))
System.out.println("That is not a valid entry please try again");
if (pick == 1){
isCorrect = true;
}
if (pick == 2){
System.out.println("Enter 1 to change your name, 2 to change your age or 3 to change your gender");
Scanner inputChange = new Scanner(System.in);
int change = inputChange.nextInt();
if (change ==1){
Scanner inputNewName = new Scanner(System.in);
System.out.println("Enter the correct name: ");
String correctedName = inputNewName.next();
you.setName(correctedName);
System.out.println(you);
isCorrect = true;
}
if (change ==2) {
Scanner inputNewAge = new Scanner(System.in);
System.out.println("Enter the correct age: ");
int correctedAge = inputNewAge.nextInt();
you.setAge(correctedAge);
System.out.println(you);
isCorrect = true;
}
if (change == 3) {
Scanner inputNewGender = new Scanner (System.in);
System.out.println("Enter the correct gender: ");
char correctedGender = inputNewGender.next().charAt(0);
you.setGender(correctedGender);
System.out.println(you);
isCorrect = true;
}
}
}
答案 0 :(得分:10)
在你的while循环中
while (isCorrect = false){
您正在使用分配运算符=
,因此它总是错误的。
您希望比较运算符==
比较值是否相同。
while (isCorrect == false){
由于它已经是boolean
,您可能只想自己使用isCorrect
:
while (!isCorrect)
答案 1 :(得分:3)
您在while语句表达式中使用赋值运算符,该运算符将始终计算为false
。请使用==
运算符来比较boolean
:
while (isCorrect == false){
或更好
while (!isCorrect){
答案 2 :(得分:2)
您可以通过以下方式帮助自己:
while( false == isCorrect )
如果错误输入相等运算符,则会抛出编译错误。