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Escape from Java
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Roberto Orgiu
June 08, 2018
Programming
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100
Escape from Java
Slides of the talk I gave at Kotlin Night Torino 2018
Roberto Orgiu
June 08, 2018
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Transcript
Escape from Java The Java Programming Language™
Rob
Why Kotlin?
Why Kotlin? Less Libraries
Why Kotlin? Less Libraries More readability
Why Kotlin? Less Libraries More readability Many functions out of
the box
Why Kotlin? Less Libraries More readability Many functions out of
the box
False myths
False myths Budget
False myths Budget Tooling
False myths Budget Tooling Learning curve
False myths Budget Tooling Learning curve
public class Model { private String property; private int anotherProperty;
private float wowAnotherProperty; private double pleaseStahpDude; public String getProperty() { return property; } public void setProperty(String property) { this.property = property; } public int getAnotherProperty() { return anotherProperty; } public void setAnotherProperty(int anotherProperty) {
} public void setAnotherProperty(int anotherProperty) { this.anotherProperty = anotherProperty; }
public float getWowAnotherProperty() { return wowAnotherProperty; } public void setWowAnotherProperty(float wowAnotherProperty) this.wowAnotherProperty = wowAnotherProperty; } public double getPleaseStahpDude() { return pleaseStahpDude; } public void setPleaseStahpDude(double pleaseStahpDude) { this.pleaseStahpDude = pleaseStahpDude; } }
public class Model { private String property; private int anotherProperty;
private float wowAnotherProperty; private double pleaseStahpDude; public String getProperty() { return property; } public void setProperty(String property) { this.property = property; } public int getAnotherProperty() { return anotherProperty; } public void setAnotherProperty(int anotherProperty) { this.anotherProperty = anotherProperty; } public float getWowAnotherProperty() { return wowAnotherProperty; } public void setWowAnotherProperty(float wowAnotherProperty) { this.wowAnotherProperty = wowAnotherProperty; } public double getPleaseStahpDude() { return pleaseStahpDude; } public void setPleaseStahpDude(double pleaseStahpDude) { this.pleaseStahpDude = pleaseStahpDude; } }
public class Model { private String property; public String getProperty()
{ return property; } public void setProperty(String property) { this.property = property; } }
public class Model { private final String property; public Model(String
property) { this.property = property; } public String getProperty() { return property; } }
import android.support.annotation.Nullable; public class Model { private final @Nullable String
property; public Model(@Nullable String property) { this.property = property; } @Nullable public String getProperty() { return property; } }
public class Model implements Parcelable{ private final @Nullable String property;
public Model(@Nullable String property) { this.property = property; } protected Model(Parcel in) { property = in.readString(); } @Override public void writeToParcel(Parcel dest, int flags) { dest.writeString(property); } @Override public int describeContents() { return 0; } public static final Creator<Model> CREATOR = new Creator<Model>() { @Override public Model createFromParcel(Parcel in) { return new Model(in); } @Override public Model[] newArray(int size) { return new Model[size]; } }; @Nullable public String getProperty() { return property; } }
import android.os.Parcelable import kotlinx.android.parcel.Parcelize @Parcelize data class Model(val property: String?)
: Parcelable
AutoValue Guava Immutables Parceler Annotations
GSON uses Reflection
GSON uses Reflection Custom TypeAdapters
GSON uses Reflection Custom TypeAdapters Vimeo Stag to generate code
GSON uses Reflection Custom TypeAdapters Vimeo Stag to generate code
Moshi
RxJava+ Retrofit
Coroutines+ Retrofit
Retrofit.Builder() .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .baseUrl(BuildConfig.API_ENDPOINT) .build()
Retrofit.Builder() .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .baseUrl(BuildConfig.API_ENDPOINT) .build() interface ApiService { @GET("home") fun home():
Single<HomeResponse> }
Retrofit.Builder() .addCallAdapterFactory(CoroutineCallAdapterFactory()) .baseUrl(BuildConfig.API_ENDPOINT) .build()
Retrofit.Builder() .addCallAdapterFactory(CoroutineCallAdapterFactory()) .baseUrl(BuildConfig.API_ENDPOINT) .build() interface ApiService { @GET("home") fun home():
Deferred<HomeResponse> }
Coroutines do not replace RxJava
Guava
Guava Collections getFirst() getLast() concat() addAll() contains() isEmpty() toImmutableList()
Guava Collections getFirst() getLast() concat() addAll() contains() isEmpty() toImmutableList() Strings
join() split() trim() any() whitespace()
Guava Collections getFirst() getLast() concat() addAll() contains() isEmpty() toImmutableList() Strings
join() split() trim() any() whitespace() Optionals
Guava Collections getFirst() getLast() concat() addAll() contains() isEmpty() toImmutableList() Strings
join() split() trim() any() whitespace() Optionals Ranges
Guava Collections getFirst() getLast() concat() addAll() contains() isEmpty() toImmutableList() Strings
join() split() trim() any() whitespace() Optionals Ranges
AutoValue Guava Immutables Parceler Annotations Guava Collections RetroLambda Project Lombok
None
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