How do I code this in java

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Java

Linux

netbeans

Write a series of Java statements that interchange the values of two numeric variables without using a third variable. Save the class as InterchangeNumbers.java.

Here is a description to help... If you have two variables which have values 3 and 7.

first variable equals the sum (10)

second variable equals the sum less the current value of the second (10-7=3)

Now we have the first variable into the second variable.

first variable equals the first variable less the second variable (10-3=7)

That's it! Have switched the value of the variables without using a third variable. Now implement this in Java :-)

What I have tried:

i tried to code it but i am not understanding it.