import lombok.AccessLevel;  import lombok.Data;  import lombok.Setter;  import lombok.ToString;    @Data  public class DataExample {        private final String name;        @Setter(AccessLevel.PACKAGE)      private int age;        private double score;        private String[] tags;        @ToString(includeFieldNames = true)      @Data(staticConstructor = "of")      public static class Exercise<T> {          private final String name;          private final T value;      }    }

import java.util.Arrays;    public class DataExample {    private final String name;    private int age;    private double score;    private String[] tags;      public DataExample(String name) {      this.name = name;    }      public String getName() {      return this.name;    }      void setAge(int age) {      this.age = age;    }      public int getAge() {      return this.age;    }      public void setScore(double score) {      this.score = score;    }      public double getScore() {      return this.score;    }      public String[] getTags() {      return this.tags;    }      public void setTags(String[] tags) {      this.tags = tags;    }      @Override public String toString() {      return "DataExample(" + this.getName() + ", " + this.getAge() + ", " + this.getScore() + ", " + Arrays.deepToString(this.getTags()) + ")";    }      protected boolean canEqual(Object other) {      return other instanceof DataExample;    }      @Override public boolean equals(Object o) {      if (o == this) return true;      if (!(o instanceof DataExample)) return false;      DataExample other = (DataExample) o;      if (!other.canEqual((Object)this)) return false;      if (this.getName() == null ? other.getName() != null : !this.getName().equals(other.getName())) return false;      if (this.getAge() != other.getAge()) return false;      if (Double.compare(this.getScore(), other.getScore()) != 0) return false;      if (!Arrays.deepEquals(this.getTags(), other.getTags())) return false;      return true;    }      @Override public int hashCode() {      final int PRIME = 59;      int result = 1;      final long temp1 = Double.doubleToLongBits(this.getScore());      result = (result*PRIME) + (this.getName() == null ? 43 : this.getName().hashCode());      result = (result*PRIME) + this.getAge();      result = (result*PRIME) + (int)(temp1 ^ (temp1 >>> 32));      result = (result*PRIME) + Arrays.deepHashCode(this.getTags());      return result;    }      public static class Exercise<T> {      private final String name;      private final T value;        private Exercise(String name, T value) {        this.name = name;        this.value = value;      }        public static <T> Exercise<T> of(String name, T value) {        return new Exercise<T>(name, value);      }        public String getName() {        return this.name;      }        public T getValue() {        return this.value;      }        @Override public String toString() {        return "Exercise(name=" + this.getName() + ", value=" + this.getValue() + ")";      }        protected boolean canEqual(Object other) {        return other instanceof Exercise;      }        @Override public boolean equals(Object o) {        if (o == this) return true;        if (!(o instanceof Exercise)) return false;        Exercise<?> other = (Exercise<?>) o;        if (!other.canEqual((Object)this)) return false;        if (this.getName() == null ? other.getValue() != null : !this.getName().equals(other.getName())) return false;        if (this.getValue() == null ? other.getValue() != null : !this.getValue().equals(other.getValue())) return false;        return true;      }        @Override public int hashCode() {        final int PRIME = 59;        int result = 1;        result = (result*PRIME) + (this.getName() == null ? 43 : this.getName().hashCode());        result = (result*PRIME) + (this.getValue() == null ? 43 : this.getValue().hashCode());        return result;      }    }  }

if(param == null){    throw new NullPointerException("param is marked @NonNull but is null")  }

public class NonNullExample {        @Getter      private String name;        public NonNullExample(@NonNull String name){          this.name = name;      }  }

import lombok.NonNull;    public class NonNullExample {    private String name;      public NonNullExample(@NonNull String name) {      if (name == null) {        throw new NullPointerException("name is marked @NonNull but is null");      }      this.name = name;    }  }

public class GetterSetterExample {        @Setter      @Getter      private int age = 10;        @Setter(AccessLevel.PROTECTED)      private String name;        @Getter(AccessLevel.PRIVATE)      private String high;  }

public class GetterSetterExample {      private int age = 10;      private String name;      private String high;      public int getAge() {      return age;    }      public void setAge(int age) {      this.age = age;    }      protected void setName(String name) {      this.name = name;    }      private String getHigh(){      return high;    }  }

@ToString  public class ToStringExample {      // ????????    private static final int STATIC_VAR = 10;    private String name;    private String[] tags;    private Shape shape = new Square(5, 10);      // ????????? toString ??    @ToString.Exclude    private int id;      public String getName() {      return this.name;    }      // callSuper ????????? toString(),    // includeFieldNames ??????????    @ToString(callSuper = true, includeFieldNames = true)    public static class Square extends Shape{      private final int width, height;        public Square(int width, int height) {        this.width = width;        this.height = height;      }    }      public static class Shape {}  }

ToStringExample toStringExample = new ToStringExample();  System.out.println(toStringExample);

ToStringExample(name=null, tags=null, shape=ToStringExample.Square(super=com.project.lombok.ToStringExample$Square@1b9e1916, width=5, height=10))

ToStringExample(name=null, tags=null, shape=ToStringExample.Square(width=5, height=10))

ToStringExample(name=null, tags=null, shape=ToStringExample.Square(super=com.project.lombok.ToStringExample$Square@1b9e1916, 5, 10))

import java.util.Arrays;    public class ToStringExample {    private static final int STATIC_VAR = 10;    private String name;    private Shape shape = new Square(5, 10);    private String[] tags;    private int id;      public String getName() {      return this.getName();    }      public static class Square extends Shape {      private final int width, height;        public Square(int width, int height) {        this.width = width;        this.height = height;      }        @Override public String toString() {        return "Square(super=" + super.toString() + ", width=" + this.width + ", height=" + this.height + ")";      }    }      @Override public String toString() {      return "ToStringExample(" + this.getName() + ", " + this.shape + ", " + Arrays.deepToString(this.tags) + ")";    }      public static class Shape {}  }

@EqualsAndHashCode  public class EqualsAndHashCodeExample {        private transient int transientVar = 10;      private String name;      private double score;      @EqualsAndHashCode.Exclude private Shape shape = new Square(5,10);      private String[] tags;      @EqualsAndHashCode.Exclude private int id;        public String getName() {          return name;      }        @EqualsAndHashCode(callSuper = true)      public static class Square extends Shape {          private final int width,height;            public Square(int width,int height){              this.width = width;              this.height = height;          }      }        public static class Shape {}  }

@NoArgsConstructor  @Getter  public class NoArgsConstructorExample {      private  Long id ;      private @NonNull String name;      private Integer age;        public static void main(String[] args) {          System.out.println(new NoArgsConstructorExample().getName());      }  }

@RequiredArgsConstructor  public class RequiredArgsConstructorExample {        @NonNull      private int id;      private final String name;      private boolean human;    }

public class RequiredArgsConstructorExample {      @NonNull      private int id;      private final String name;      private boolean human;        public RequiredArgsConstructorExample(@NonNull int id, String name) {          if (id == null) {              throw new NullPointerException("id is marked @NonNull but is null");          } else {              this.id = id;              this.name = name;          }      }  }

@AllArgsConstructor  public class AllArgsConstructorExample {        private int id;      private String name;      private int age;    }

public AllArgsConstructorExample(int id, String name, int age) {      this.id = id;      this.name = name;      this.age = age;  }

@RequiredArgsConstructor(staticName = "of")  @AllArgsConstructor(access = AccessLevel.PROTECTED)  public class ConstructorExample<T> {    private int x, y;    @NonNull private T description;      @NoArgsConstructor    public static class NoArgsExample {      @NonNull private String field;    }  }

public class ConstructorExample<T> {    private int x, y;    @NonNull private T description;      private ConstructorExample(T description) {      if (description == null) throw new NullPointerException("description");      this.description = description;    }      public static <T> ConstructorExample<T> of(T description) {      return new ConstructorExample<T>(description);    }      @java.beans.ConstructorProperties({"x", "y", "description"})    protected ConstructorExample(int x, int y, T description) {      if (description == null) throw new NullPointerException("description");      this.x = x;      this.y = y;      this.description = description;    }      public static class NoArgsExample {      @NonNull private String field;        public NoArgsExample() {      }    }  }