java – null！= The difference between variable and variable= null

• Java

null！= Variable and variable= What's the difference between null?

if ((null != value1) || (null != value2) || (null != value3)) {
            .......
            .......
            .......
}

or

if ((value1 != null) || (value2 != null) || (value3 != null)) {
                .......
                .......
                .......
}

Please suggest the best one and the logical changes between these?

Solution

No difference

But people often write "ABC" Equals (foo) instead of foo Equals ("ABC") to avoid zero exceptions

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