If you have a method into which you pass a String parameter that you compare with another string then:
void foo( String str ){ String CONST_STR = "bar"; // DON'T COMPARE LIKE THIS: //if ( str == CONST_STR ) ) // AND DON'T COMPARE LIKE THIS // if ( str.equals( CONST_STR ) ) // JUST COMPARE LIKE THIS: if ( CONST_STR.equals( str ) ) {} // OR LIKE THIS: if ( "bar".equals( str ) ) {}}This way you don’t have to protect yourself against a null being passed into the method.
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