Question

我如何在java中执行此操作我无法将大小设置为我的文本字段我不知道具体如何，结果必须如何：

这是我的代码的输出我必须在id和第一个textfield之后再添加2个标签和texfields Mine：

class IU extends JFrame{
public IU(){
    super("Tabela mysql");

    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setSize(400, 400);
    getContentPane().setLayout(new BorderLayout());
    JToolBar myBar=new JToolBar();
    getContentPane().add(myBar,BorderLayout.NORTH);

    JButton btnFirst=new JButton();
    JButton btnPrevious=new JButton();
    JButton btnNext=new JButton();
    JButton btnLast=new JButton();
    JButton btnAdd=new JButton();
    JButton btnEdit=new JButton();
    JButton btnDelete=new JButton();
    JButton btnSearch=new JButton(); 
    JButton btnUndo=new JButton();
    JButton btnSave=new JButton();

    JTextField txtAfis=new JTextField();

    btnFirst.setIcon(new ImageIcon("MoveFirst.png"));
    btnPrevious.setIcon(new ImageIcon("MovePrevious.png"));
    btnNext.setIcon(new ImageIcon("MoveNext.png"));
    btnLast.setIcon(new ImageIcon("MoveLast.png"));
    btnAdd.setIcon(new ImageIcon("Add.png"));
    btnEdit.setIcon(new ImageIcon("Edit.png"));
    btnDelete.setIcon(new ImageIcon("Delete.png"));
    btnSearch.setIcon(new ImageIcon("find.jpg"));
    btnUndo.setIcon(new ImageIcon("undo.jpg"));
    btnSave.setIcon(new ImageIcon("save.jpg"));
    JPanel panel = new JPanel();
    JPanel panel1 = new JPanel();
    JPanel panel2 = new JPanel();
    JTextField t = new JTextField();
    JTextField t1 = new JTextField();
    JTextField t2 = new JTextField();
    t.setSize(100, 20);

    t1.setBounds(20,10,70,20);
    t2.setBounds(20,10,70,20);


    JLabel label = new JLabel("Nume");
    JLabel label2 = new JLabel("Prenume");
    JLabel label3 = new JLabel("Id");

    getContentPane().add(panel);


    panel.add(label3);
    panel.add(t, BorderLayout.EAST);

    panel1.add(label2);
    panel1.add(t1);
    panel2.add(label);
    panel2.add(t2);

    myBar.add(btnFirst);
    myBar.add(btnPrevious);
    myBar.add(txtAfis);
    myBar.add(btnNext);
    myBar.add(btnLast);
    myBar.add(btnAdd);
    myBar.add(btnEdit);
    myBar.add(btnDelete);
    myBar.add(btnSearch);
    myBar.add(btnSave);
    myBar.add(btnUndo);
    add(panel);

    }
}

Answer 1

创建文本字段时使用：

library(data.table)

DT <- as.data.table(expand.grid(x = 1:10, t = letters[1:4]))
DT[, y := rnorm(10), by = t]

# Function to get estimates and standard error for
# each regressor.
ExtractLm <- function(model) {
    a <- summary(model)
    return(list(rownames(a$coefficients),
                a$coefficients[, 1],
                a$coefficients[, 2]))
}

DT.regression <- DT[, ExtractLm(lm(x ~ y)), by = t]

该数字将允许文本字段确定其自身的大小。在上述情况下，它将包含10个“W”字符。

然后使用布局管理器来获得所需的布局。

如何安排多个面板

1 个答案: