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Create a sequence of log files

This is an example of how to create a sequence of log files. Creating a sequence of log files implies that you should: Create a new instance of a Logger. Create an instance of FileHandler with a specific number of logging files sequences, a specific size for each file and append set to true. In the example 5 files will ...

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Create custom Formatter for Logger handler

In this example we shall show you how to create custom Formatter for a Logger‘s Handler. The Handler usually uses a Formatter associated with it to format LogRecords. The Formatter takes a LogRecord and converts it to a string. LogRecord objects are used to pass logging requests between the logging framework and individual log Handlers. To create a custom Formatter ...

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Set Formatter for Logger handler

With this example we are going to demonstrate how to set a Formatter for a Logger Handler. The Formatter is used by the Handler to format LogRecords. In short, to set a Formatter for a Logger’s handler you should: Create a new Logger instance with getLogger(String name) API method of Logger. Create a new FileHandler to write to a specific ...

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Set filter on Logger handler

This is an example of how to set a filter on a Logger’s Handler. The Filter is used to provide control over what is logged, beyond the control that the levels provide. Each Logger and each Handler can have a filter associated with it. The Logger or Handler will call the isLoggable(LogRecord record) method to check if a given LogRecord ...

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Log method call

In this example we shall show you how to log a method call. We have implemented the LogMethodCall Class, with a simple method to log its messages. The basic steps of the example are described below: The call(String arg1, Object arg2) method of the class takes a String argument and an Object argument and returns a boolean value. The method ...

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Write Log entries to log file

With this example we are going to demonstrate how to write Log entries to a log file. In short, to write Log entries to a log file you should: Create a new FileHandler to write to a specific file. Create a new Logger instance with getLogger(String name) API method of Logger. Add the handler to the Logger, with addHandler(Handler handler) ...

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Swap List elements example

This is an example of how to swap a List’s elements . We are using the swap(List list, int i, int j) method of the Collections Class. Collections provides static methods that operate on or return collections. We are also using the ArrayList as a List implementation, but the same API applies to any type of List implementation classes e.g. ...

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Shuffle List elements example

In this example we shall show you how to shuffle a List’s elements. This is provided by the shuffle(List list) API method of the Collections class. The Collections class provides static methods that operate on or return collections. The ArrayList is used as a List implementation, but the same API applies to any type of List implementation classes e.g. Vector ...

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Reverse order of List example

With this example we are going to demonstrate how to reverse the order of a List. This is provided by the reverse(List list) API method of the Collections class. The ArrayList is used as a List implementation, but the same API applies to any type of List implementation classes e.g. Vector etc. In short, to reverse the order of a ...

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Replace specific element of List example

This is an example of how to replace a specific element of a List. We will use the replaceAll(List list, Object oldVal, Object newVal) API method of the Collections class. The ArrayList is used as a List implementation, but the same API applies to any type of List implementation classes e.g. Vector etc. Replacing a specific element of a List ...

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