How can an object be moved to a new point?

This code draws a circle in a frame

import java.awt.Canvas;
import java.awt.Graphics;
import javax.swing.JFrame;
import java.awt.Color;

public class Drawing extends Canvas { 

    public static void main(String[] args) {
        JFrame frame = new JFrame("My Drawing");
        Canvas canvas = new Drawing();
        canvas.setSize(400, 400);
        frame.add(canvas);
        frame.pack();
        frame.setVisible(true);
    }

    public void paint(Graphics g) {
	    g.fillOval(50, 50, 50, 50);
    }
}

Now how can it be moved to a new point (for example (100,100))?

Use setLocation(Point p) which moves the component to a new location.

In your example:

import java.awt.*;
import javax.swing.JFrame;

public class Drawing extends Canvas {

    public static void main(String[] args) throws Exception {
        JFrame frame = new JFrame("My Drawing");
        Canvas canvas = new Drawing();
        canvas.setSize(400, 400);
        frame.add(canvas);
        frame.pack();
        frame.setVisible(true);
        Thread.sleep(1000);

        canvas.setLocation(new Point(100,100));

    }

    public void paint(Graphics g) {
        g.fillOval(50, 50, 50, 50);
    }
}

In Swing you don't need a Canvas to draw shapes. You can extend JPanel and override its paintComponent() method. Please refer to the following.

1. Painting in AWT and Swing
2. Performing Custom Painting

All you need to do is change the values of the x and y coordinates when you call method fillOval(). Here is a small application that demonstrates.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

public class Drawing extends JPanel implements ActionListener, Runnable {
    private static final String  MOVE = "Move";

    private int  x;
    private int  y;
    private JFrame  frame;

    public Drawing() {
        x = 10;
        y = 10;
    }

    @Override
    public void actionPerformed(ActionEvent event) {
        String actionCommand = event.getActionCommand();
        switch (actionCommand) {
            case MOVE:
                moveCircle();
                break;
            default:
                JOptionPane.showMessageDialog(frame,
                                              actionCommand,
                                              "Unhandled",
                                              JOptionPane.WARNING_MESSAGE);
        }
    }

    @Override
    public void run() {
        showGui();
    }

    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        ((Graphics2D) g).setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                                          RenderingHints.VALUE_ANTIALIAS_ON);
        g.setColor(Color.BLUE);
        g.fillOval(x, y, 50, 50);
    }

    private JButton createButton(String text, int mnemonic, String tooltip) {
        JButton button = new JButton(text);
        button.setMnemonic(mnemonic);
        button.setToolTipText(tooltip);
        button.addActionListener(this);
        return button;
    }

    private JPanel createButtonsPanel() {
        JPanel buttonsPanel = new JPanel();
        buttonsPanel.add(createButton(MOVE, KeyEvent.VK_M, "Moves circle."));
        return buttonsPanel;
    }

    private JPanel createCanvas() {
        setPreferredSize(new Dimension(400, 400));
        return this;
    }

    private void moveCircle() {
        x = 100;
        y = 100;
        repaint();
    }

    private void showGui() {
        frame = new JFrame("Drawing");
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame.add(createCanvas(), BorderLayout.CENTER);
        frame.add(createButtonsPanel(), BorderLayout.PAGE_END);
        frame.pack();
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new Drawing());
    }
}

When you run the above code, you will see a blue circle near the top left corner of the application window.

When you click on the Move button, you will see the circle drawn in a different location.