How to auto fit table and aligning the table to center, according to Word Document Size Apache-POI?

How to make this table to auto-fit to document page width, when the column size increases, using apache-poi and aligning that table to center.

This code generates a word Document extracting data from Java to word file located in c drive. I have manually set width but it now works fine. If would be valuable for me if proper guidance is provided

public Word2Doc() throws Exception {

    System.out.println("This is Word To Document Class");

    File file = null; 
           FileOutputStream fos = null; 
           XWPFDocument document = null; 
           XWPFParagraph para = null; 
           XWPFRun run = null; 
           try { 
               // Create the first paragraph and set it's text. 
               document = new XWPFDocument(); 
               para = document.createParagraph(); 

               para.setAlignment(ParagraphAlignment.CENTER); 

               para.setSpacingAfter(100); 

               para.setSpacingAfterLines(10);
               run = para.createRun(); 
               for(int i=1; i<=5; i++)
               run.setText("Test Name \009\009\009 Value \t\t\t\t Normal Ranges\013\013"); 
               run.addBreak();    // similar to new line
               run.addBreak();

               XWPFTable table = document.createTable(4, 3);

               table.setRowBandSize(1);
               table.setWidth(1);
               table.setColBandSize(1);
               table.setCellMargins(1, 1, 100, 30);

               table.setStyleID("finest");


               table.getRow(1).getCell(1).setText("EXAMPLE OF TABLE");
               table.getRow(2).getCell(1).setText("fine");
               XWPFParagraph p1 = table.getRow(0).getCell(0).getParagraphs().get(0);
               p1.setAlignment(ParagraphAlignment.CENTER);
                       XWPFRun r1 = p1.createRun();
                       r1.setBold(true);
                       r1.setText("Test Name");
                       r1.setItalic(true);