14. 59. 6.JTable添加逻辑值的方法 Add logic to get value method

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;


public class GetValueAtLogic extends JFrame{
	public GetValueAtLogic(){
		JTable table = new JTable(new CoordinateTableModel());
		getContentPane().add(new JScrollPane(table),BorderLayout.CENTER);
		pack();
	}

	public static void main(String[] args) {
		GetValueAtLogic gva = new GetValueAtLogic();
		gva.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		gva.setVisible(true);
	}
}

class CoordinateTableModel extends AbstractTableModel{//coordinate:坐标，协调 同等的 调整
	private int[] x = {2,3,5,7,11,13,17,19};//x is prime(质数/初期) < 20

	public int getColumnCount() {//返回2列
		return 2;
	}

	public int getRowCount() {//返回x.length行
		return x.length;
	}

	public Object getValueAt(int r, int c) {//拿到值 
		return (c == 0) ? new Integer(x[r]) : new Integer(2 * x[r] + 1);
	}
	
	public String getColumnName(int c){//拿到列名
		return (c == 0 )? "x" : "2x + 1";
	}
}