CompareObjectWithEqualsCheck.java

class A {
  String str1 = "blue";
  String str2 = "blue";
  String[] strArray1 = {"blue"};
  String[] strArray2 = {"blue"};
  private void method() {
    if (str1 == str2) {} // Noncompliant [[sc=14;ec=16]] {{Change this comparison to use the equals method.}}
    if(str1 == "green") {} // Noncompliant {{Change this comparison to use the equals method.}}
    if (str1.equals(str2)) {}
    if(strArray1 == strArray2) {}
    if(null == str1){ }
    if(str1 == null){ }
  }
}

class B {
  String[][] strArray2 = {{"blue"}};
  private void method() {
    if(strArray2 == strArray2){}
    if(strArray2[0] == strArray2[1]){}
    if(strArray2[0][0] == strArray2[1][1]){} // Noncompliant {{Change this comparison to use the equals method.}}
    byte[] bits;
    if(bits [0] == bits [1]) {}
    if(Foo.FOO == Foo.BAR) {}
  }
  enum Foo {
    FOO,
    BAR;
  }
}
class C{
  String str1 = "blue";
  String str2 = "blue";
  String[] strArray1 = {"blue"};
  String[] strArray2 = {"blue"};
  private void method() {
    if (str1 != str2) {} // Noncompliant {{Change this comparison to use the equals method.}}
    if(str1 != "green") {} // Noncompliant {{Change this comparison to use the equals method.}}
    if (str1.equals(str2)) {}
    if(strArray1 != strArray2) {}
    if(null != str1){ }
    if(str1 != null){ }
  }

  public boolean equals(Object obj) {
    if (str1 != str2) {}
    if (str1 == str2) {}
    return super.equals(obj);
  }
  void meth(){
    Integer i;
    char c = 'c';
    if(i == (byte)0){}
    if(i == c){}
    if(i == (short)1){}
    if(i == 1){}
    if(i == 1L){}
    if(i == 1F){}
    if(i == 1D){}
  }

  Class<?> c1;
  Class<?> c2;
  void foo() {
    if(c1 == c2);
  }
  enum MyEnum{
    Value;
  }
  class MyClass<T> {
    void foo() {
      if(myMethod(this) == MyEnum.Value) {} // Noncompliant {{Change this comparison to use the equals method.}}
      java.util.List<MyEnum> myEnumList;
      java.util.List list;
      if(myEnumList.get(0) == MyEnum.Value) {}
      if(list.get(0) == MyEnum.Value) {} // Noncompliant {{Change this comparison to use the equals method.}}

    }

    T myMethod(MyClass<T> instance){}
  }
}