Question

我有这个

        buttons[0].setBounds(12, 161, 96, 25);  // Numerical 0
        buttons[1].setBounds(12, 50, 42, 25);   // Numerical 1
        buttons[2].setBounds(66, 50, 42, 25);   // Numerical 2
        buttons[3].setBounds(120, 50, 42, 25);  // Numerical 3
        buttons[4].setBounds(12, 87, 42, 25);   // Numerical 4
        buttons[5].setBounds(66, 87, 42, 25);   // Numerical 5
        buttons[6].setBounds(120, 87, 42, 25);  // Numerical 6
        buttons[7].setBounds(12, 124, 42, 25);  // Numerical 7
        buttons[8].setBounds(66, 124, 42, 25);  // Numerical 8
        buttons[9].setBounds(120, 124, 42, 25); // Numerical 9
        buttons[10].setBounds(174, 124, 50, 62);// Equals button (=)
        buttons[11].setBounds(174, 50, 110, 25);// DEL Button (DEL)
        buttons[12].setBounds(120, 161, 42, 25);// DOT Button  (.)
        buttons[13].setBounds(174, 87, 50, 25); // MINUS Button(-)
        buttons[14].setBounds(234, 87, 50, 25); // PLUS Button (+)
        buttons[15].setBounds(236, 124, 50, 25);// PUTA Button (*)
        buttons[16].setBounds(236, 161, 50, 25);// DJEL Button (/)

我想优化它。这就是我如何管理使用数组添加项目以及为其他东西添加for循环。

JButton [] buttons = new JButton [17];
        String [] btnCommands = {"0","1","2","3","4","5","6","7","8","9","=","DEL",".","-","+","*","/"};

        for (int i = 0;i < btnCommands.length;i++) {
            buttons[i] = new JButton(btnCommands[i]);
        }

我如何为setBounds做一个4维数组？

int [][][][] bounds = {{{{}}}};

如何初始化和使用它？

Answer 1

我会使用JButton.setBounds(Rectangle)方法，而是使用Rectangles数组。

String[] btnCommands = {"0","1","2","3","4","5","6","7","8","9","=","DEL",".","-","+","*","/"};
Rectangle[] bounds = {
    new Rectangle(12, 161, 96, 25),  // Numerical 0
    new Rectangle(12, 50, 42, 25),   // Numerical 1
    new Rectangle(66, 50, 42, 25),   // Numerical 2
    new Rectangle(120, 50, 42, 25),  // Numerical 3
    new Rectangle(12, 87, 42, 25),   // Numerical 4
    new Rectangle(66, 87, 42, 25),   // Numerical 5
    new Rectangle(120, 87, 42, 25),  // Numerical 6
    new Rectangle(12, 124, 42, 25),  // Numerical 7
    new Rectangle(66, 124, 42, 25),  // Numerical 8
    new Rectangle(120, 124, 42, 25), // Numerical 9
    new Rectangle(174, 124, 50, 62),// Equals button (=)
    new Rectangle(174, 50, 110, 25),// DEL Button (DEL)
    new Rectangle(120, 161, 42, 25),// DOT Button  (.)
    new Rectangle(174, 87, 50, 25), // MINUS Button(-)
    new Rectangle(234, 87, 50, 25), // PLUS Button (+)
    new Rectangle(236, 124, 50, 25),// PUTA Button (*)
    new Rectangle(236, 161, 50, 25),// DJEL Button (/)
};

JButton[] buttons = new JButton[17];
for (int i = 0;i < btnCommands.length;i++) {
    JButton b = new JButton(btnCommands[i]);
    b.setBounds(bounds[i]);
    buttons[i] = b;
}

Answer 2

我认为你不需要4维阵列。您可能需要一个二维数组，我们第二个维度中有4个条目，每个绑定一个。

所以你会：

int [][] bounds = {{12, 161, 96, 25}, {12, 50, 42, 25}, ... }

你会像以下一样使用它：

buttons[0].setBounds(bounds[0][0], bounds[0][1], bounds[0][2], bounds[0][3]);

在循环中，只需将第一个维度替换为i，并保持对其他维度的访问权限。

需要帮助在Java中初始化4维数组

2 个答案: