I have written following small utility to abstract away the lazy initialization logic. (I tend to use lazy variables quite often.)Are there any issues in this implementation?// File: F0.javapublic abstract class F0<A> {  public abstract A apply();}// File: Lazy.javapublic class Lazy<A> {  private boolean isInitialized = false;  private A content;  private final F0<A> init;  private Lazy(F0<A> init) {    this.init = init;  }  public static <A> Lazy<A> initializedAs(F0<A> init) {    return new Lazy<A>(init);  }  @Override  public String toString() {    return this.get().toString();  }  public A get() {    if (!isInitialized) {      content = init.apply();      isInitialized = true;    }    return content;  }  @Override  public boolean equals(Object o) {    if (this == o) {      return true;    }    if (o == null || getClass() != o.getClass()) {      return false;    }    Lazy lazy = (Lazy) o;    Object c = this.get();    if (c != null ? !c.equals(lazy.get()) : lazy.get() != null) {      return false;    }    return true;  }  @Override  public int hashCode() {    return this.get().hashCode();  }}Edit:Here is an example usage from the current project I am working on.final Prerequisite prerequisite = new Prerequisite() {  private Lazy<String> minimumRequiredJavaVersion = Lazy.initializedAs(    new F0<String>() {      @Override      public String apply() {        return SystemProperties.isWindows() && SystemProperties.is64Bit() ? 1.7 : 1.6;      }    }  );  @Override  public boolean isSatisfied() {    return SystemProperties.javaVersionIsMinimum(minimumRequiredJavaVersion.get());  }  @Override  public String failureMessage() {    StringBuilder sb = new StringBuilder();    sb.append(Minimum required Java version is:  + minimumRequiredJavaVersion.get() + \n);    sb.append(Your system has  + JAVA_SPECIFICATION_VERSION + .);    return sb.toString();  }};
Are there any issues in this `Lazy` implementation?
java;lazy