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- // paket yang diperlukan
- import javax.swing.*;
- import java.awt.event.ActionListener;
- import java.awt.event.ActionEvent;
- import javax.swing.JOptionPane;
- class CobaWarning extends JFrame{
- // attribut
- //membuat tombol
- JButton tombol1 = new JButton("warning !");
- // JTextField(String text,int panjang)
- JTextField text_f = new JTextField("text awal",25);
- //konstruktor
- public CobaWarning(){
- //frame seting---------------------------------------------------------------------
- //memanggil konstruktor kelas induk (JFrame)
- super("Coba Warning");
- //seting besar frame 400 x 400 px
- this.setSize(200,200);
- //seting agar bisa ditutup
- this.setDefaultCloseOperation(EXIT_ON_CLOSE);
- //seting kemunculan frame di tengah window
- this.setLocationRelativeTo(null);
- //seting layout frame
- this.getContentPane().setLayout(null);
- //frame seting---------------------------------------------------------------------
- //menambahkan komponen ke frame dan seting letak
- this.add(tombol1);
- this.add(text_f);
- // setbounds(x,y,lebar,tinggi)
- tombol1.setBounds(10,10,150,25);
- text_f.setBounds(10,40,150,25);
- //seting aksi tombol
- tombol1.addActionListener(new ActionListener( ) {
- public void actionPerformed(ActionEvent e){
- // kode disini; isi text_f dengan nilai
- JOptionPane.showMessageDialog(null,"isi text nya : "+text_f.getText());
- }
- });
- // menampilkan frame
- show();
- }
- public static void main(String[] args){
- new CobaWarning();
- }
- }
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