In the previous article "A brief analysis of the EOS blockchain grapefruit wallet front-end plug-in scatter development (sharing)", we learned about the development of the EOS wallet front-end plug-in scatter in the blockchain. The following article will introduce you to the new java.util.function.*pojo reflection method. Let’s take a look.
Go to the code and look at the example
Write an ordinary POJO
public class City { private String name; private String code; public City() { } public City(String name, String code) { this.name = name; this.code = code; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } }
Traditional way
// Use a constructor with parameters to create a City City sf = new City("San Francisco", "SF"); // Use a default constructor with no parameters to create a City City la = new City(); // Set the members using setters la.setName("Los Angeles"); la.setCode("LA");
New getter access method
// Use the City's method references and assign them to functions Function<City, String> getNameFunction = City::getName; Function<City, String> getCodeFunction = City::getCode; System.out.println("The code for " + getNameFunction.apply(sf) + " is " + getCodeFunction.apply(sf)); -> The code for San Francisco is SF
New setter access method
// Use the City's method references and assign them to biconsumers BiConsumer<City, String> setNameBiConsumer = City::setName; BiConsumer<City, String> setCodeBiConsumer = City::setCode; City ny = new City(); setNameBiConsumer.accept(ny, "New York"); setCodeBiConsumer.accept(ny, "NY");
Access constructor to create new instance
// Use the City's constructor method reference to create // a default constructor reference. Supplier<City> defaultConstructor = City::new; City sd = defaultConstructor.get(); sd.setName("San Diego"); sd.setCode("SD");
Builder with parameters
// Use the City's constructor method reference to create // a two-parameter constructor reference. BiFunction<String, String, City> twoParameterConstructor = City::new; City dc = twoParameterConstructor.apply("Washington, D. C.", "DC");
Recommended learning: java video tutorial
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