Código gerando exception - JAVA

bichodope
(usa Arch Linux)

Enviado em 31/10/2018 - 16:21h

Olá a todos,
Tenho um código que fiz para relacionar três classe. Esse:
//ação de um botão para realizar emprestimo
//OBS.: considerem que já foram passados os respectivos livros para o arraylist liv
{
String rep = jTextField3.getText();
String sen = String.valueOf(jPasswordField1.getPassword());
String mat = jTextField1.getText();
ArrayList<String> liv = new ArrayList<>();

switch (vSpinner) {
case 5:
liv.add(jTextField7.getText());
case 4:
liv.add(jTextField6.getText());
case 3:
liv.add(jTextField5.getText());
case 2:
liv.add(jTextField4.getText());
case 1:
liv.add(jTextField2.getText());
}

Emprestimo emp = new Emprestimo();

for (Cliente c : clientes) { //criando relacionando de clientes com emprestimos

if (c.getMatricula().equals(mat)) {
emp.setCliente(c);
c.setEmprestimo(emp);
break;
}
}
for (Livro l : livros) { //criando relacionamento de clientes com emprestimos

for(String s : liv){
if(l.getId().equals(s)){
emp.setLivro(l);
l.setEmprestimo(emp);
}
}
}

emp.FazerEmprestimo(sen, mat);
emprestimos.add(emp);

}


Está gerando essa exception, alguém pode me ajudar com o código ?
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at classes.Cliente.setEmprestimo(Cliente.java:74)
at view.CadEmprestimo.btnCadastroActionPerformed(CadEmprestimo.java:257)
at view.CadEmprestimo.access$000(CadEmprestimo.java:13)
at view.CadEmprestimo$1.actionPerformed(CadEmprestimo.java:66)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6539)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)