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In this noncompliant code example, multiple threads can invoke the setValues() method to set the a and b fields. Because this class fails to test for integer overflow, users of the Adder class must ensure that the arguments to the setValues() method can be added without overflow. (For more information, see rule NUM16 NUM00-J. Detect or prevent integer overflow.)

Code Block

bgColor	#FFcccc

final class Adder {
  private int a;
  private int b;

  public int getSum() {
    return a + b;
  }

  public void setValues(int a, int b) {
    this.a = a;
    this.b = b;
  }
}

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<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="2a11e11312a21a51-fa04cde6-40914e71-989cbffc-f060a5cc39b4e560c46bc7f8"><ac:plain-text-body><![CDATA[	[[Bloch 2008	AA. Bibliography#Bloch 08]]	Item 66: Synchronize access to shared mutable data	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="d79b8ad263ec8b1a-24d75cc1-4e894906-864b9726-02a744baa481fc3dfa1acfb8"><ac:plain-text-body><![CDATA[	[[Goetz 2006	AA. Bibliography#Goetz 06]]	2.3. "Locking"	]]></ac:plain-text-body></ac:structured-macro>
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="fbfce6bc26d67df0-ba0e605d-4ea04c26-bc239c6d-decb07542db6e57657d8814b"><ac:plain-text-body><![CDATA[	[[JLS 2005	AA. Bibliography#JLS 05]]	[Chapter 17 Threads and Locks	http://java.sun.com/docs/books/jls/third_edition/html/memory.html], ]]></ac:plain-text-body></ac:structured-macro>
	Section 17.4.5 Happens-Before Order
	Section 17.4.3 Programs and Program Order
	Section 17.4.8 Executions and Causality Requirements
<ac:structured-macro ac:name="unmigrated-wiki-markup" ac:schema-version="1" ac:macro-id="078377f148768c1b-dcbf878a-4569492a-ab038c26-4d68f77dbe802f96fbb2a13d"><ac:plain-text-body><![CDATA[	[[Lea 2000	AA. Bibliography#Lea 00]]	Section 2.2.7 The Java Memory Model	]]></ac:plain-text-body></ac:structured-macro>
	Section 2.1.1.1 Objects and Locks
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