java - 如何编写代码，以便在发生某事后不会再发生其他事情？

Question

假设如果游戏的最后一个关卡被击败，那么您不会显示一个对话框询问玩家是否想要进入下一个关卡，而是显示主菜单。所以基本上，如果发生了某件事，那么之后应该发生的事情就不会发生。

private void submitButtonActionPerformed(java.awt.event.ActionEvent evt) {                                             

    final ImageIcon pokeballIcon = new ImageIcon("C:\\Users\\bacojul15\\Pictures\\pokeball5.gif");
    final ImageIcon pokemoneggIcon = new ImageIcon("C:\\Users\\bacojul15\\Pictures\\nidoking.gif");
    final ImageIcon pokemonredIcon = new ImageIcon("C:\\Users\\bacojul15\\Pictures\\red.gif");

    String userAnswer = answertextArea.getText().trim();

        if (userAnswer.equalsIgnoreCase(answers.get(questionNumber))) {

            answerLabel.setText("Correct");
            levelScore ++;
            triviagui.totalScore ++;


        } else {
            answerLabel.setText("Incorrect");
        }
        answertextArea.setText("");
        questionNumber++;
        if(questionNumber == questions.size()){
            JOptionPane.showMessageDialog(null, "Your score for this level was : " + levelScore + " out of 10. \n Your total score is " + triviagui.totalScore, "Scores",JOptionPane.INFORMATION_MESSAGE, pokeballIcon );
                if(difficulty == 3){
                        JOptionPane.showMessageDialog(null, "Good job you beat the game! \n Your total score was " + triviagui.totalScore + " out of 30.", "Thanks for playing!", JOptionPane.INFORMATION_MESSAGE, pokemonredIcon);
                        triviagui.questionFrame.setVisible(false);
                        triviagui.mainFrame.setVisible(true);
                    }
                int leveloptionPane = JOptionPane.showConfirmDialog(null,"Would you like to go on to the next level?" , "Next Level?", JOptionPane.YES_NO_OPTION, levelScore, pokemoneggIcon);
            if(leveloptionPane == JOptionPane.YES_OPTION){
                    difficulty++;
                    triviagui.questionFrame.setVisible(false);
                    triviagui.questionFrame=new QuestionFrame(difficulty);
                    triviagui.questionFrame.setVisible(true);

            }
            if(leveloptionPane == JOptionPane.NO_OPTION){
                triviagui.questionFrame.setVisible(false);
                triviagui.mainFrame.setVisible(true);                    
        }
            return;
        }
        updateQuestionScore();

}  

Answer 1

你只是想做:

if(something happens) {
    return;
}