java将两条if语句汇总为一条

Question

我有许多if和if else语句，如下代码所示。有没有可能对这个问题进行总结

 if (zob.equals("")) 

及

else if (!(nameShortestDistance.equals("ABC")) 
    && !(nameShortestDistance.equals("DEF")))

一个if语句条件中的语句

代码：

if (zob.equals("")) {
    int stops_number = number_stop_in_table(macD, con);
    if (stops_number > 2) {
        Analyzer analyzer = new Analyzer(host, user, password);
        analyzer.analyze_data();
        System.out.println("Result: " + stops_number);
    }
    maintain_records(speedD, macD, con,
            shortestDistance, nameShortestDistance,
            sto_nam);
} else if (!(nameShortestDistance
        .equals("ABC"))
        && !(nameShortestDistance
                .equals("DEF"))) {
    int stops_number = number_stop_in_table(macD, con);
    if (stops_number > 2) {
        Analyzer analyzer = new Analyzer(host, user, password);
        analyzer.analyze_data();
        System.out.println("Result: "+ stops_number);
    }
    maintain_records(speedD, macD, con, shortestDistance, 
        nameShortestDistance, sto_nam);
}

Answer 1

也许我会考虑重构，这样你就有了测试的方法，然后给那些方法有意义的名字。您不必在原语字段上使用一个带有条件的大型方法，而可以使用如下内容：

if (isSuchAndSuchPopulated() && isShortestDistance()) {
   ...
}

因此，您的方法变得更短，并且（希望）更具可读性。此外，如果这些方法是公开的，那么您可以单独对它们进行单元测试，这使生活更简单

Answer 2

这可能会有帮助。不同类型操作员的列表。使用这些，你的选择是无穷无尽的。。。花点时间学习这些

从https://docs.oracle.com/javase/tutorial/java/nutsandbolts/opsummary.html复制

Simple Assignment Operator

=       Simple assignment operator
Arithmetic Operators

+       Additive operator (also used
        for String concatenation)
-       Subtraction operator
*       Multiplication operator
/       Division operator
%       Remainder operator
Unary Operators

+       Unary plus operator; indicates
        positive value (numbers are 
        positive without this, however)
-       Unary minus operator; negates
        an expression
++      Increment operator; increments
        a value by 1
       Decrement operator; decrements
        a value by 1
!       Logical complement operator;
        inverts the value of a boolean
Equality and Relational Operators

==      Equal to
!=      Not equal to
>       Greater than
>=      Greater than or equal to
<       Less than
<=      Less than or equal to 
Conditional Operators

&&      Conditional-AND
||      Conditional-OR
?:      Ternary (shorthand for 
        if-then-else statement)
Type Comparison Operator

instanceof      Compares an object to a specified type 
Bitwise and Bit Shift Operators

~       Unary bitwise complement
<<      Signed left shift
>>      Signed right shift
>>>     Unsigned right shift
&       Bitwise AND
^       Bitwise exclusive OR
|       Bitwise inclusive OR

Answer 3

对。它被称为“conditional OR operator”（也称为“逻辑或运算符”），||

if (a || b) {
    // We get here if either operand is true
)

有一个关于它们的教程