Creating Fillable PDF Form Fields in Java Application

<repositories>
<repository>
<id>com.e-iceblue</id>
<name>e-iceblue</name>
<url>http://repo.e-iceblue.com/nexus/content/groups/public/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>e-iceblue</groupId>
<artifactId>spire.pdf.free</artifactId>
<version>3.9.0</version>
</dependency>
</dependencies>
import java.awt.*;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.EnumSet;

import com.spire.pdf.FileFormat;
import com.spire.pdf.PdfDocument;
import com.spire.pdf.PdfPageBase;
import com.spire.pdf.fields.*;
import com.spire.pdf.graphics.*;

public class FormFields {
public static void main(String[] args) throws Exception {

//create a PdfDocument object
PdfDocument doc = new PdfDocument();

//add a page
PdfPageBase page = doc.getPages().add();

//initialize x and y coordinates
float baseX = 100;
float baseY = 0;

//create brush objects
PdfSolidBrush brush1 = new PdfSolidBrush(new PdfRGBColor(Color.BLUE));
PdfSolidBrush brush2 = new PdfSolidBrush(new PdfRGBColor(Color.black));

//create font
PdfFont font = new PdfFont(PdfFontFamily.Times_Roman, 12f, EnumSet.of(PdfFontStyle.Regular));

//add a textbox to pdf
String text = "TextBox:";
page.getCanvas().drawString(text, font, brush1, new Point2D.Float(0, baseY));
Rectangle2D.Float tbxBounds = new Rectangle2D.Float(baseX, baseY , 150, 15);
PdfTextBoxField textBox = new PdfTextBoxField(page, "textbox");
textBox.setBounds(tbxBounds);
textBox.setText("Hello World");
textBox.setFont(font);
doc.getForm().getFields().add(textBox);
baseY +=25;

//add checkboxes to pdf
page.getCanvas().drawString("CheckBox:", font, brush1, new Point2D.Float(0, baseY));
java.awt.geom.Rectangle2D.Float rec1 = new java.awt.geom.Rectangle2D.Float(baseX, baseY, 15, 15);
PdfCheckBoxField checkBoxField = new PdfCheckBoxField(page, "checkbox1");
checkBoxField.setBounds(rec1);
checkBoxField.setChecked(false);
page.getCanvas().drawString("Option 1", font, brush2, new Point2D.Float(baseX + 20, baseY));
java.awt.geom.Rectangle2D.Float rec2 = new java.awt.geom.Rectangle2D.Float(baseX + 70, baseY, 15, 15);
PdfCheckBoxField checkBoxField1 = new PdfCheckBoxField(page, "checkbox2");
checkBoxField1.setBounds(rec2);
checkBoxField1.setChecked(false);
page.getCanvas().drawString("Option 2", font, brush2, new Point2D.Float(baseX+90, baseY));
doc.getForm().getFields().add(checkBoxField);
doc.getForm().getFields().add(checkBoxField1);
baseY += 25;

//add a listbox to pdf
page.getCanvas().drawString("ListBox:", font, brush1, new Point2D.Float(0, baseY));
java.awt.geom.Rectangle2D.Float rec = new java.awt.geom.Rectangle2D.Float(baseX, baseY, 150, 50);
PdfListBoxField listBoxField = new PdfListBoxField(page, "listbox");
listBoxField.getItems().add(new PdfListFieldItem("Item 1", "item1"));
listBoxField.getItems().add(new PdfListFieldItem("Item 2", "item2"));
listBoxField.getItems().add(new PdfListFieldItem("Item 3", "item3"));;
listBoxField.setBounds(rec);
listBoxField.setFont(font);
listBoxField.setSelectedIndex(0);
doc.getForm().getFields().add(listBoxField);
baseY += 60;

//add radiobuttons to pdf
page.getCanvas().drawString("RadioButton:", font, brush1, new Point2D.Float(0, baseY));
PdfRadioButtonListField radioButtonListField = new PdfRadioButtonListField(page, "radio");
PdfRadioButtonListItem radioItem1 = new PdfRadioButtonListItem("option1");
radioItem1.setBounds(new Rectangle2D.Float(baseX, baseY, 15, 15));
page.getCanvas().drawString("Option 1", font, brush2, new Point2D.Float(baseX + 20, baseY));
PdfRadioButtonListItem radioItem2 = new PdfRadioButtonListItem("option2");
radioItem2.setBounds(new Rectangle2D.Float(baseX + 70, baseY, 15, 15));
page.getCanvas().drawString("Option 2", font, brush2, new Point2D.Float(baseX + 90, baseY));
radioButtonListField.getItems().add(radioItem1);
radioButtonListField.getItems().add(radioItem2);
radioButtonListField.setSelectedIndex(0);
doc.getForm().getFields().add(radioButtonListField);
baseY += 25;

//add a combobox to pdf
page.getCanvas().drawString("ComboBox:", font, brush1, new Point2D.Float(0, baseY));
Rectangle2D.Float cmbBounds = new Rectangle2D.Float(baseX, baseY, 150, 15);
PdfComboBoxField comboBoxField = new PdfComboBoxField(page, "combobox");
comboBoxField.setBounds(cmbBounds);
comboBoxField.getItems().add(new PdfListFieldItem("Item 1", "item1"));
comboBoxField.getItems().add(new PdfListFieldItem("Item 2", "itme2"));
comboBoxField.getItems().add(new PdfListFieldItem("Item 3", "item3"));
comboBoxField.getItems().add(new PdfListFieldItem("Item 4", "item4"));
comboBoxField.setSelectedIndex(0);
comboBoxField.setFont(font);
doc.getForm().getFields().add(comboBoxField);
baseY += 25;

//add a signature field to pdf
page.getCanvas().drawString("Signature:", font, brush1, new Point2D.Float(0, baseY));
PdfSignatureField sgnField= new PdfSignatureField(page,"sgnField");
Rectangle2D.Float sgnBounds = new Rectangle2D.Float(baseX, baseY, 150, 80);
sgnField.setBounds(sgnBounds);
doc.getForm().getFields().add(sgnField);
baseY += 90;

//add a button to pdf
page.getCanvas().drawString("Button:", font, brush1, new Point2D.Float(0, baseY));
Rectangle2D.Float btnBounds = new Rectangle2D.Float(baseX, baseY, 50, 15);
PdfButtonField buttonField = new PdfButtonField(page, "button");
buttonField.setBounds(btnBounds);
buttonField.setText("Sumbit");
buttonField.setFont(font);
doc.getForm().getFields().add(buttonField);

//save to file
doc.saveToFile("AddFormField.pdf", FileFormat.PDF);
}
}

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