# Replace Assignment with Compound Operator

# Description

Assignments involving an arithmetic assignment can be simplified by using a compound operator such as +=, -=, /= or *=. For example, this rule will transform a=a+1 into a+=1.
The rule only applies if both operands are primitive types.

# Benefits

Applying this rule leads to more simplicity in the code base and thus improves readability.

# Tags

# Code Changes

# Operator +=

Pre

i = i + 3;
i = 3 + i;
i = i + (3 + 4);

Post

i += 3;
i += 3;
i += (3 + 4);

# Operator -=

Pre

i = i - 3;
i = -3 + i;
i = i - (3 + 4);

Post

i -= 3;
i += -3;
i -= (3 + 4);

# Operator *=

Pre

i = i * 3;
i = i * (3 + 4);

Post

i *= 3;
i *= (3 + 4);

# Operator /=

Pre

i = i / 3;
i = i / (3 + 4);

Post

i /= 3;
i /= (3 + 4);

# Limitations

Rule can be applied only on the following types:

int
double
float
long
short

🛠️ Auto-refactor Available

You can auto-refactor this with jSparrow.
Drop this button to your Eclipse IDE workspace to install jSparrow for free:

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# Properties

Property	Value
Rule ID	ArithmethicAssignment
First seen in jSparrow version	1.0.0
Minimum Java version	1.4
Remediation cost	2 min

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