[RESOLVIDO] Após gerar .jar não encontra imagens e .html dentro da aplicação

getResource("/arquivo");  
getResourceAsStream("/arquivo");

InputStream IMAGEM_INICIO = getClass().getResourceAsStream("/br/com/sistema/imagens/inicio.png");

Image imagem = Toolkit.getDefaultToolkit().getImage(getClass().getResource("/br/com/sistema/imagens/inicio.png"));

mport java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;

public class Principal {
	public static void main(String[] args) {
		substituiArquivo();
	}

	public static void substituiArquivo() {
		FileChannel sourceChannel = null;
		FileChannel destinationChannel = null;
		try {
			sourceChannel = new FileInputStream("Foto1.jpg").getChannel();
			destinationChannel = new FileOutputStream("c:\Foto1_copiado.jpg").getChannel();
			sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
		} catch (FileNotFoundException f) {
			System.err.println("O arquivo não foi encontrado! Erro: " + f.getMessage());
		} catch (Exception e) {
		} finally {
			if (sourceChannel != null)
				try {
					sourceChannel.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			if (destinationChannel != null)
				try {
					destinationChannel.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}
}

package principal;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.nio.channels.FileChannel;

import javax.swing.ImageIcon;

public class Principal {
	public static void main(String[] args) {
		new Principal().substituiArquivo();
	}

	public void substituiArquivo() {
		FileChannel sourceChannel = null;
		FileChannel destinationChannel = null;
		try {
			//new ImageIcon(getClass().getResource("/imagem/Foto1.jpg");  
			
			//String path = getClass().getResource("Foto1.jpg").getFile();
			
			//URL url = getClass().getResource("/imagem/Foto1.jpg");


			sourceChannel = new FileInputStream("/imagem/Foto1.jpg").getChannel();
			destinationChannel = new FileOutputStream("c:\Foto1_copiado1.jpg").getChannel();
			sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel);
		} catch (FileNotFoundException f) {
			System.err.println("O arquivo não foi encontrado! Erro: " + f.getMessage());
		} catch (Exception e) {
		} finally {
			if (sourceChannel != null)
				try {
					sourceChannel.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			if (destinationChannel != null)
				try {
					destinationChannel.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
	}
}

public void copiaArquivo(){
        try {
            FileChannel arquivo_entrada = new FileInputStream(new File(getClass().getResource("/com/jns/util/swing/rsrc/icons/date.png").getFile())).getChannel();
            FileChannel arquivo_saida = new FileOutputStream("C:/arquivo_teste.png").getChannel();
            
            arquivo_entrada.transferTo(0, arquivo_entrada.size(), arquivo_saida);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

package principal;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.channels.FileChannel;

public class Principal2 {
	public static void main(String[] args) {
		new Principal2().copiaArquivo();
	}

	public void copiaArquivo(){  
	    try {  
	        FileChannel arquivo_entrada = new FileInputStream(new File(getClass().getResource("/principal/Foto1.jpg").getFile())).getChannel();  
	        FileChannel arquivo_saida = new FileOutputStream("C:/arquivo_teste.jpg").getChannel();  
	          
	        arquivo_entrada.transferTo(0, arquivo_entrada.size(), arquivo_saida);  
	    } catch (Exception e) {  
	        e.printStackTrace();  
	    }  
	}  
}

public void copiaArquivo(){
        try {
            InputStream file = getClass().getResourceAsStream("/com/jns/util/swing/rsrc/icons/date.png");
            File outPutFile = new File("C:/arquivo.png");
            OutputStream out = new FileOutputStream(outPutFile);
            
            byte[] buf = new byte[1024];
            int size;
            
            while ((size=file.read(buf)) > 0)
                out.write(buf,0,size);
            
            out.close();
            file.close();
            
            System.out.println("Arquivo copiado...");

        } catch (Exception e) {
            e.printStackTrace();
        }
    }