Chamar outro Form

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;


public class FormPrincipal extends JFrame {
	private static final long serialVersionUID = 1L;
	private JButton btInvestir;
	
	
	public FormPrincipal() {
       super("Principal");
       this.btInvestir= new JButton("Investir");
       Container container=getContentPane();
       container.add(btInvestir);
       setSize(100, 150);
       container.setLayout(new FlowLayout(FlowLayout.CENTER));
       setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       
       btInvestir.addActionListener(new ActionListener(){

		public void actionPerformed(ActionEvent e) {
			FormInvestir formInvestir= new FormInvestir();
			formInvestir.setVisible(true);
			
		}
    	   
       });
	}
	
	public static void main(String[] args) {
		FormPrincipal formPrincipal= new FormPrincipal();
		formPrincipal.setVisible(true);
		
	}

}

import java.awt.Container;
import java.awt.FlowLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;


public class FormInvestir extends JFrame {
	private static final long serialVersionUID = 1L;
	private JLabel nomeForm;
	
	public FormInvestir() {
		super("Form Investir");
		this.nomeForm= new JLabel("Form investir");
		Container container= getContentPane();
		container.setLayout(new FlowLayout(FlowLayout.CENTER));
		container.add(nomeForm);
		setSize(200,100);
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
	}
	

}