rspec/rules/S2259/java/compliant-code.adoc

Ensuring the variable `myObject` has a value resolves the issue:

[source,java,diff-id=1,diff-type=compliant]
----
public void method() {
  Object myObject = new Object();
  System.out.println(myObject.toString()); // Compliant: myObject is not null
}
----

Preventing the non-compliant code to be executed by returning early:

[source,java,diff-id=2,diff-type=compliant]
----
public void method(Object input)
{
  if (input == null)
  {
    return;
  }
  System.out.println(input.toString()); // Compliant: if 'input' is null, this is unreachable
}
----

Ensuring that no unboxing of `null` value can happen resolves the issue

[source,java,diff-id=3,diff-type=compliant]
----
public boolean method() {
  Boolean boxed = true;
  return boxed; // Compliant
}
----

Ensuring that both `conn` and `stmt` are not `null` resolves the issue:

[source,java,diff-id=4,diff-type=compliant]
----
Connection conn = null;
Statement stmt = null;
try {
  conn = DriverManager.getConnection(DB_URL,USER,PASS);
  stmt = conn.createStatement();
  // ...
} catch(Exception e) {
  e.printStackTrace();
} finally {
  if (stmt != null) {
    stmt.close();  // Compliant
  }
  if (conn != null) {
    conn.close();  // Compliant
  }
}
----

Checking the returned value of `getName()` resolves the issue:

[source,java,diff-id=5,diff-type=compliant]
----
@CheckForNull
String getName() {...}

public boolean isNameEmpty() {
  String name = getName();
  if (name != null) {
    return name.length() == 0; // Compliant
  } else {
    // ...
  }
}
----

Ensuring that the provided `color` is not `null` resolves the issue:

[source,java,diff-id=6,diff-type=compliant]
----
private void merge(@Nonnull Color firstColor, @Nonnull Color secondColor) {...}

public void append(@CheckForNull Color color) {
  if (color != null) {
    merge(currentColor, color);  // Compliant
  }
}
----