對於我介紹Java的最後一個項目,我決定做一個Mastermind Peg Game。netbeans中的「找不到符號」錯誤(Java Netbeans 6.5)
這是提交按鈕代碼:
private void submitButtonActionPerformed(java.awt.event.ActionEvent evt) {
Integer guess1, guess2, guess3, guess4;
Integer rightnumber = 0, rightposition = 0;
guess1 = Integer.parseInt (firstInput.getText());
guess2 = Integer.parseInt (secondInput.getText());
guess3 = Integer.parseInt (thirdInput.getText());
guess4 = Integer.parseInt (fourthInput.getText());
//Values are compared to the actual guess.
//(THIS IS WHERE I GET THE FOLLOWING ERROR:
//"cannot find symbol, symbol : variable answerdigit,
//location: class finalproject.Singleplayer"
if (guess1 == answerdigit[0]);
{
rightposition = rightposition + 1;
}
}
這是啓動按鈕。這裏生成4位數的答案/代碼。
private void startButtonActionPerformed(java.awt.event.ActionEvent evt)
{
// Declare variables for 4 digit answer, guess for each number
Integer one, two, three, four;
//Generate random number between 1 and 6 for each digit in the answer
int[] answerdigit = new int[4];
for(int i=0;i<4;i++)
{
answerdigit[i]=(int)(Math.random()*6+1);
}
}
我得到一個錯誤:
cannot find symbol, symbol : variable answerdigit, location: class finalproject.Singleplayer
我不明白是什麼錯誤意味着。
您使用的變量,它不是方法的範圍內存在submitButtonActionPerformed(...)。閱讀Java變量範圍,瞭解錯誤的含義:http://www.java-made-easy.com/variable-scope.html –