int a = 1;
int b = 2;
int c;
int d;
c = ++b;//3
d = a++;//2
c++;//4
System.out.println("a = " + a);
System.out.println("b = " + b);
System.out.println("c = " + c);
System.out.println("d = " + d);
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int a = 1;
int b = 2;
int c;
int d;
c = ++b;//3
d = a++;//2
c++;//4
System.out.println("a = " + a);
System.out.println("b = " + b);
System.out.println("c = " + c);
System.out.println("d = " + d);
The answer is correct. It has to do with when the increment/decrement occurs. For a fuller explanation, please check the relevant chapter in the text you are using to learn Java or online.
Assignment, Arithmetic, and Unary Operators (The Java™ Tutorials > Learning the Java Language > Language Basics)
thanks