编写一个Java程序，添加必要的控件，第一行分别为按钮1，按钮2，按钮3，其中按钮1和按钮3大小相同。第二行分别为按钮7，按钮4，按钮5，按钮6，四个按钮大小相同。要求一行按钮高度为10，第二行按钮高度为50，其中按钮1和按钮7在同一列。

好的，我可以为您提供一个示例代码，如下所示：

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class ButtonLayout extends JFrame {

    public ButtonLayout() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setTitle("Button Layout");

        JPanel panel = new JPanel(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();

        // 第一行按钮
        JButton button1 = new JButton("Button 1");
        c.gridx = 0;
        c.gridy = 0;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.5;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button1, c);

        JButton button2 = new JButton("Button 2");
        c.gridx = 1;
        c.gridy = 0;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.0;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button2, c);

        JButton button3 = new JButton("Button 3");
        c.gridx = 2;
        c.gridy = 0;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.5;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button3, c);

        // 第二行按钮
        JButton button7 = new JButton("Button 7");
        c.gridx = 0;
        c.gridy = 1;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.5;
        c.weighty = 0.5;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button7, c);

        JButton button4 = new JButton("Button 4");
        c.gridx = 1;
        c.gridy = 1;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.0;
        c.weighty = 0.5;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button4, c);

        JButton button5 = new JButton("Button 5");
        c.gridx = 2;
        c.gridy = 1;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.0;
        c.weighty = 0.5;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button5, c);

        JButton button6 = new JButton("Button 6");
        c.gridx = 3;
        c.gridy = 1;
        c.gridheight = 1;
        c.gridwidth = 1;
        c.weightx = 0.0;
        c.weighty = 0.5;
        c.fill = GridBagConstraints.BOTH;
        panel.add(button6, c);

        add(panel);
        pack();
        setVisible(true);
    }

    public static void main(String[] args) {
        new ButtonLayout();
    }
}

这个程序使用了`GridBagLayout`布局管理器来实现您的要求。`GridBagConstraints`类用于设置控件所在的行、列、大小等属性，从而实现界面布局。

您可以运行这个程序，看看效果如何。如果您有任何疑问或需求，请随时告诉我。