Java Programming Tutorials

Java programming tutorials with many code examples!

Spring Setter Injection

Spring Setter Injection

This form of Dependency Injection is used very often, especially for optional dependencies and reconfigurable beans. We’ll show how to use it using Spring annotations.

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Java Lang Tutorial

In Java Lang Tutorial you will learn handy features of classes from java.lang package!

Java Lang Classes

Reflection

Java Lang Exceptions

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Java Util Map merge(key, value, BiFunction)

java.util.Map.merge(key, value, BiFunction)

The method Map.merge(key, value, BiFunction) associates given value with the given key or calculates the new value from the old value and the given one using provided remapping function.

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Java Util Map getOrDefault

java.util.Map.getOrDefault(key, defaultValue)

The method Map.getOrDefault(key, defaultValue) returns mapped value for the given key or defaultValue if there is no such mapping.

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Java Util Map forEach(BiConsumer)

java.util.Map.forEach(BiConsumer)

The method Map.forEach(BiConsumer) performs the given action for each entry of the map until all are processed or exception is thrown.

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Java Util Map computeIfAbsent(key,Function)

java.util.Map.computeIfAbsent(key, Function)

The method Map.computeIfAbsent(key, Function) computes the new value and associates it with the key if there is no mapping for the given key or the mapping is null. Returns the new value associated with the key.

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