我正在 Netbeans 中创建一个组合锁类，我很困惑为什么当我运行文件时我没有收到任何输出。有人知道我在做什么错吗？任何和所有的帮助将不胜感激！这是我的构造函数类中的代码：
package combinationlock ;
/**
* A class to implement a combination lock with 26 dial positions
* and a three-letter combination
*
* @Carlos
*/
public class CombinationLock
{
// instance variable declarations go here
private boolean open ;
private int Count ;
private String position1 ;
private String position2 ;
private String position3 ;
private String first = "F" ;
private String second = "I" ;
private String third = "U" ;
/**
* Creates a lock with a given combination consisting of three upper-case characters.
* @param first the first letter of the combination
* @param second the second letter of the combination
* @param third the third letter of the combination
*/
public CombinationLock(String first, String second, String third)
{
this.first = first ;
this.second = second ;
this.third = third ;
open = false ;
Count = 0 ;
}
/**
* Set the dial to a position
* @param aPosition a String consisting of a single uppercase letter (A..Z)
*/
public void setPosition(String aPosition)
{
if (Count == 0)
{
position1 = aPosition ;
Count = Count + 1 ;
}
else if (Count == 1)
{
position2 = aPosition ;
Count = Count + 1 ;
}
else if (Count == 2)
{
position3 = aPosition ;
}
}
/**
* Try opening the lock
*/
public void tryToOpen()
{
if (first.equals(position1) && second.equals(position2) && third.equals(position3))
{
open = true ;
System.out.println("Its open!") ;
}
else
{
open = false ;
System.out.println("Wrong combination! Please try again.") ;
}
}
/**
* Check whether the lock is open
* @return true or false indicating whether the lock is open
*/
public boolean isOpen()
{
return open ;
}
/**
* Close the lock and print a message indicating that the lock is now closed
*/
public void lock()
{
Count = 0 ;
open = false ;
System.out.println("You re-apply the lock") ;
}
}
这是我在测试器类中使用的代码：
package combinationlock ;
import javax.swing.JOptionPane ;
/**
*
* @author Carlos
*/
public class CombinationLockTester
{
public static void main (String[] args)
{
CombinationLock MasterLock = new CombinationLock("F", "I", "U");
String input = JOptionPane.showInputDialog
("Please enter first letter.") ;
MasterLock.setPosition(input) ;
String input2 = JOptionPane.showInputDialog
("Please enter second letter.") ;
MasterLock.setPosition(input2) ;
String input3 = JOptionPane.showInputDialog
("Please enter third letter") ;
MasterLock.setPosition(input3);
System.out.println("The combination entered was " +input + input2 +input3) ;