consumer , supplier , function java 8 code example

Example 1: java 8 function supplier consumer

@Testpublic void supplierWithOptional(){    Supplier<Double> doubleSupplier = () -> Math.random();    Optional<Double> optionalDouble = Optional.empty();    System.out.println(optionalDouble.orElseGet(doubleSupplier));}

Example 2: java 8 function supplier consumer

@Testpublic void supplierWithOptional(){    
  Supplier<Double> doubleSupplier = () -> Math.random();   
  Optional<Double> optionalDouble = Optional.empty();    
  System.out.println(optionalDouble.orElseGet(doubleSupplier));}