LazyDemo.java

/**
 * This is a Java class using Javaslang's Lazy
 */
class LazyDemo {{
    
    // -- Lazy instance
    
    Lazy<String> value = Lazy.of(() -> "Yay!");
    
    value.toString(); // = Lazy(?)
    
    value.get();      // = "Yay!"
    
    value.toString(); // = "Lazy(Yay!)
    
    // -- lazy value
  
    // chars is a CharSequence Proxy backed by a Lazy
    CharSequence chars = Lazy.asVal(() -> "Yay!", CharSequence.class);
    
    // = "Yay!" (lazily evaluated)
    chars.toString();
    
}}

ScalaREPL.txt

#
# This is just a comparison to Scala's behavior
#

scala> lazy val s = "Yay!"
s: String = <lazy>

scala> println(s)
Yay!