java - 关于 switch 使用的一点小帮助

Question

如果这个问题的答案已经存在，我很抱歉我没有找到这个问题......

如果我想对从 -2 到 0 的整数执行 presice 操作，并且对于 1 到 6 之间的整数应用相同的方法，仅对我的整数进行更改，那么此语句是否正确？

像这样:

    public void setCaseGUI(Point pt, int i, boolean b){
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setSelected(b);
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setIcon(null);

        switch(i) {
            case -2:    plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText("F");
                        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(Color.red);
                        break;

            case -1:    plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText("B");
                        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(Color.red);
                        break;

            case 0: plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText("");
                    plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(null);
                    break;

            case 1: case 2: case 3: case 4: case 5: case 6: case 7:
            case 8: plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText(String.valueOf(i));
                    plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(null);
                    break;

            default: System.out.println("Erreur de changement d'état/case !");
        }
    }

请不要对我太严厉，我几个月前才开始学习开发

Answer 1

这将执行您所描述的操作。通常，当多个案例执行相同的操作时，其格式如下:

switch(i) {
    case -2: 
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText("F");
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(Color.red);
        break;

    case -1:
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText("B");
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(Color.red);
        break;

    case 0: 
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText("");
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(null);
        break;

    case 1: 
    case 2: 
    case 3:
    case 4:
    case 5:
    case 6:
    case 7:
    case 8: 
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setText(String.valueOf(i));
        plateau.cellule[(int)pt.getAbs()][(int)pt.getOrd()].setForeground(null);
        break;

    default:
        System.out.println("Erreur de changement d'état/case !");
}