You cannot make setVisible(true); your first line of code. Add setVisible(true); as the last line in your constructor.
Java Gui components do not appear in the JFrame
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19-10-2022 - |
문제
i have a strange problem which may a problem with eclipse that i use:
i want to programm a calculator but the components which should appear in the Jframe, are not there! The textfield do not appears until i click on it and the button come out when i go over it with the mouse pointer...
here's my code:
package calculator;
import java.awt.Font;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
public class MeinTaschenrechner extends JFrame {
JTextField textField;
JButton button1;
public MeinTaschenrechner() {
setVisible(true);
setSize(300, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setTitle("Taschenrechner");
setResizable(false);
setLayout(null);
textField=new JTextField("0");
textField.setBounds(5, 10, 285, 50);
Font font=textField.getFont().deriveFont(Font.PLAIN,30);
textField.setFont(font);
add(textField);
// addingNumberButtons();
button1=new JButton("1");
button1.setBounds(5, 65, 75, 65);
add(button1);
}
And here is my main class:
package calculator;
public class ExecuteKlasse {
public static void main(String[] args) {
MeinTaschenrechner cc=new MeinTaschenrechner();
}
}
해결책
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