＆QUOT;将＆QUOT;文本的JTextField

问题描述

我试图做一个小的应用程序，其中U输入ID（以JButton的 - 从0到9的帮助 - ），然后通过已pssed到putText法$ P $，然后在JTextField中显示它的数量-the问题是，我每次preSS新号码一个我$ p $在前看不见前pssed：秒。谁能帮我与PLS？

 公共类IdPanel继承JPanel {    私人的JTextField idField;
    私人的JLabel idLabel;    公共IdPanel（）{        的setLayout（新的GridBagLayout（））;        集preferredSize（新尺寸（500，70））;        idField =新的JTextField（20）;
        idField.setFont（新字体（衬线，Font.PLAIN，20））;        idLabel =新的JLabel（输入ID：）;
        idLabel.setFont（新字体（衬线，Font.PLAIN，20））;        GridBagConstraints的GC =新的GridBagConstraints（）;        gc.gridx = 0;
        gc.gridy = 0;
        gc.insets =新插图（9,9，9,9）;
        gc.anchor = GridBagConstraints.CENTER;
        加（idLabel，GC）;        gc.gridx = 1;
        gc.anchor = GridBagConstraints.CENTER;
        加（idField，GC）;
    }    公共无效putText（串号）{
        idField.setText（数）;
    }
}
 

解决方案

尝试：

  idField.setText（idField.getText（）+电话号码）;
 

I'm trying to make a small application where U input ID (with help of JButton -from 0 to 9 - ) and then pass the number that have been pressed to putText-Method and then display it in JTextField-the problem is that every time I press new number the one I pressed before disapears:s . Could anyone help me with that pls?

public class IdPanel extends JPanel {

    private JTextField idField;
    private JLabel idLabel;

    public IdPanel() {

        setLayout(new GridBagLayout());

        setPreferredSize(new Dimension(500, 70));

        idField = new JTextField(20);
        idField.setFont(new Font("Serif", Font.PLAIN, 20));

        idLabel = new JLabel("Enter ID:");
        idLabel.setFont(new Font("Serif", Font.PLAIN, 20));

        GridBagConstraints gc = new GridBagConstraints();

        gc.gridx = 0;
        gc.gridy = 0;
        gc.insets = new Insets(9, 9, 9, 9);
        gc.anchor = GridBagConstraints.CENTER;
        add(idLabel, gc);

        gc.gridx = 1;
        gc.anchor = GridBagConstraints.CENTER;
        add(idField, gc);
    }

    public void putText(String number) {
        idField.setText(number);
    }
}

解决方案

try:

idField.setText(idField.getText()+number);

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