Text Box

import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JTextField;

public class TextBox {
  JFrame frame;
  JTextField text;
  JButton b;

  public TextBox() {
    frame = new JFrame("TextBox");
    frame.setSize(new Dimension(300, 100));
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setLayout(new FlowLayout());
    text = new JTextField();
    text.setColumns(20);
    frame.add(text);
    b = new JButton("Submit");
    b.addMouseListener(new MouseAdapter() {
      @Override
      public void mouseClicked(MouseEvent e) {
        text_print();
      }
    });
    frame.add(b);
    frame.setVisible(true);
  }

  public void text_print() {
    System.out.println(text.getText());
  }

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