JAVA;如果没有,预计不会发表其他声明 [英] JAVA ; expected not a statement else without if
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问题描述
您好我想知道我的代码有什么问题我得到了标题中说明的错误。这有什么问题?提前致谢。为什么我需要这么多细节,我觉得我已经很好地描述了它。
Hi I was wondering what's wrong with my code I get the errors stated in the title. What is wrong with this? Thanks in advance. Why do I need so many details, I feel like I've described it well enough.
import java.util.Scanner;
public class CombinationLock
{
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
System.out.print("Please enter three uppercase letters.");
System.out.println("Hit enter after each letter.");
String str1 = in.nextLine();
String str2 = in.nextLine();
String str3 = in.nextLine();
System.out.println("Would you like to open the lock?");
if(Yes)
Scanner lol = new Scanner(System.in);
System.out.print("Please enter the combination for this lock.");
System.out.println("Hit enter after each letter");
String str4 = lol.nextLine();
String str5 = lol.nextLine();
String str6 = lol.nextLine();
if(str4.equals(str1))
if (str5.equals(str2))
if(str6.equals(str3))
System.out.println("Congratulations you have unlocked the lock :)");
else
System.out.println("Sorry the combination you have input is not correct :/");
else
System.out.println("Sorry the combination you have input is not correct :/");
else
System.out.println("Sorry the combination you have input is not correct :/");
else
System.out.println("This lock has been locked enter code here with the letters that you have just input.");
}
}
推荐答案
你必须使用 {}
!
那里:
if(Yes)
Scanner lol = new Scanner(System.in);
System.out.print("Please enter the combination for this lock.");
此if语句仅适用于此行 Scanner lol = new Scanner( System.in);
This if-statement is only for this line Scanner lol = new Scanner(System.in);
所以最后一个else语句没有连接到任何if语句。
So the last else-statement is not connected to any if-statement.
这是你应该如何使用 {}
来获得正确的输出并明确什么是:
This is how you should use {}
for getting the right output and to be clear what is for what :
Scanner in = new Scanner(System.in);
System.out.print("Please enter three uppercase letters.");
System.out.println("Hit enter after each letter.");
String str1 = in.nextLine();
String str2 = in.nextLine();
String str3 = in.nextLine();
System.out.println("Would you like to open the lock?");
if (Yes) {
Scanner lol = new Scanner(System.in);
System.out.print("Please enter the combination for this lock.");
System.out.println("Hit enter after each letter");
String str4 = lol.nextLine();
String str5 = lol.nextLine();
String str6 = lol.nextLine();
if (str4.equals(str1)) {
if (str5.equals(str2)) {
if (str6.equals(str3)) {
System.out.println("Congratulations you have unlocked the lock :)");
} else {
System.out.println("Sorry the combination you have input is not correct :/");
}
} else {
System.out.println("Sorry the combination you have input is not correct :/");
}
} else {
System.out.println("Sorry the combination you have input is not correct :/");
}
} else {
System.out.println("This lock has been locked enter code here with the letters that you have just input.");
}
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