程序包 net.dongliu.commons

类 Objects2

  • public class Objects2
extends java.lang.Object
    Jdk already has one Objects class, So named as Objects2

    • 构造器概要

      构造器 
      构造器 说明
      Objects2()  

    • 方法概要

      所有方法 静态方法 具体方法 已过时的方法 
      修饰符和类型 方法 说明
      static <T> T cast​(java.lang.Object value)
      Method for suppress generic class type cast warning.
      static <T> T elvis​(@Nullable T value1, java.util.function.Supplier<T> supplier)
      Elvis operator.
      static <T> T elvis​(@Nullable T value1, T value2)
      Elvis operator.
      static <T> T runWith​(T value, java.util.function.Consumer<T> consumer)
      Convenient method for manipulating object.
      static java.lang.String toString​(@Nullable java.lang.Object value)
      已过时。
      static Objects2.ToStringHelper toStringHelper​(java.lang.Class<?> cls)
      已过时。

      • 从类继承的方法 java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • 构造器详细资料

      • Objects2

        public Objects2()

    • 方法详细资料

      • cast

        public static <T> T cast​(java.lang.Object value)
        Method for suppress generic class type cast warning. Usage: 
         var list = Objects2.>cast(value);
        类型参数:
        T - the class type

      • elvis

        public static <T> T elvis​(@Nullable T value1,
                          T value2)
        Elvis operator. If value1 is not null, use return value1; else return values2.
        类型参数:
        T - the value type
        返回:
        non-null value
        抛出:
        java.lang.NullPointerException - if value2 is null

      • runWith

        public static <T> T runWith​(T value,
                            java.util.function.Consumer<T> consumer)
        Convenient method for manipulating object. 
         Pojo pojo = runWith(new Pojo(), p -> {p.setX(x); p.setY(y);})

      • elvis

        public static <T> T elvis​(@Nullable T value1,
                          java.util.function.Supplier<T> supplier)
        Elvis operator. If value1 is not null, use return value1; else use value calculate by supplier
        类型参数:
        T - the value type
        参数:
        supplier - to calculate non-null value
        返回:
        non-null value
        抛出:
        java.lang.NullPointerException - if supplier is null or produce null value

      • toStringHelper

        @Deprecated
public static Objects2.ToStringHelper toStringHelper​(java.lang.Class<?> cls)
        已过时。
        Get a ToStringHelper to convert specific type object to string.

      • toString

        @Deprecated
public static java.lang.String toString​(@Nullable java.lang.Object value)
        已过时。
        Convert object to string, by concat each filed name and value, using reflection.

        Implementation Details: This method use a internal weak ToStringHelper cache to boost performance.

        参数:
        value - the object to convert to string
        返回:
        string represent of value