https://openjdk.java.net/ 
public interface javax.sql.ConnectionEventListener extends java.util.EventListener
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.sql.ConnectionEventListener
  super_class: java.lang.Object
{
  public abstract void connectionClosed(javax.sql.ConnectionEvent);
    descriptor: (Ljavax/sql/ConnectionEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      event  

  public abstract void connectionErrorOccurred(javax.sql.ConnectionEvent);
    descriptor: (Ljavax/sql/ConnectionEvent;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      event  
}
SourceFile: "ConnectionEventListener.java"