By Douglas Dunn
JavaaA A ideas distills the Java Language Specification into a rare source for each Java developer. Doug Dunn has eradicated imprecise details merely wanted by means of JVM and compiler builders, and extra an important real-world assistance now not present in the spec. the outcome: the main readable, available Java reference ever created. JavaaA A principles bargains a radical evaluation of the Java 2 Platform, the java.lang, java.io, and java.util programs, and linked APIs and sophistication libraries. Long-time advisor and coach Doug Dunn introduces the internal workings of the language with unprecedented readability, detailing wonderful issues and providing specialist assistance for developing strong, effective software program. issues coated comprise: lexical constitution, compilation devices, program courses, programs, JAR documents, versioning, reference kinds, variables and constants, strings and arrays, and masses extra. For all beginning-to-intermediate point Java programmers, together with skilled builders in different languages who desire a Java educational and reference that respects their services.
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Additional info for Java Rules
That the this keyword can be used in constructors shows that the object is created before the constructor (or rather, the corresponding
10 10. GridBagCnstraints class. 54 JAVA RULES These “constraints” very well could have been constructor parameters in a different solution to the problem of laying out GUI components. Instead, they are public fields in the GridBagConstraints class, which is basically a C struct (or record in other legacy systems) in which the value of what would be constructor parameters can be directly set. The constructor parameters are then passed to the GridBagLayout class that actually uses them as an instance of the GridBagConstraints class.
In the context of a discussion of constructor design, I refer to automatic The initial value of every instance variable is either statically compiled or dynamically assigned in the body of a constructor. initialization using standard default values, instance variables initializers, and instance initialization blocks as statically compiled initial values. The arguments passed to constructors are dynamically assigned initial values. The critical difference is that statically compiled initial values are more or less the same for all instances, whereas dynamically assigned initial values are potentially different for each object created.
Java Rules by Douglas Dunn