it is my work #169
it is my work #169
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WalkthroughNew Java file introducing a calculator application with a base Changes
Sequence DiagramsequenceDiagram
participant Main as main()
participant Calc as Calculator
participant Add as Add (Value)
participant Mul as Mul (Value)
participant Sub as Sub (Value)
participant Div as Div (Value)
Main->>Add: new Add()
Main->>Add: setValue(5, 3)
Main->>Calc: performOperation(add, "Addition")
Calc->>Add: getResult()
Add-->>Calc: 8
Calc->>Main: print result
Main->>Mul: new Mul()
Main->>Mul: setValue(5, 3)
Main->>Calc: performOperation(mul, "Multiplication")
Calc->>Mul: getResult()
Mul-->>Calc: 15
Calc->>Main: print result
Main->>Sub: new Sub()
Main->>Sub: setValue(5, 3)
Main->>Calc: performOperation(sub, "Substraction")
Calc->>Sub: getResult()
Sub-->>Calc: 2
Calc->>Main: print result
Main->>Div: new Div()
Main->>Div: setValue(5, 3)
Main->>Calc: performOperation(div, "Division")
Calc->>Div: getResult()
Div-->>Calc: 1
Calc->>Main: print result
Estimated code review effort🎯 2 (Simple) | ⏱️ ~10 minutes
Poem
Pre-merge checks and finishing touches❌ Failed checks (1 warning, 1 inconclusive)
✅ Passed checks (1 passed)
✨ Finishing touches
🧪 Generate unit tests (beta)
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Actionable comments posted: 2
🧹 Nitpick comments (1)
LCAPP.java (1)
1-11: Consider making this an abstract class.The
Valuebase class always has itsgetResult()overridden by subclasses, and the default return of0is never used. Making both the class and method abstract would better express the design intent and prevent accidental instantiation.Apply this diff to make the design clearer:
-class Value +abstract class Value { int a,b; void setValue(int x,int y) { a=x; b=y; } - int getResult() - { return 0; - } + abstract int getResult(); }
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (1)
LCAPP.java(1 hunks)
🔇 Additional comments (4)
LCAPP.java (4)
12-17: LGTM!The addition operation is implemented correctly.
18-23: LGTM!The multiplication operation is implemented correctly.
24-29: LGTM!The subtraction operation is implemented correctly.
36-43: LGTM!The
Calculatorclass correctly delegates to the polymorphicgetResult()method and formats output.
| class Div extends Value | ||
| { | ||
| int getResult(){ | ||
| return a/b; | ||
| } | ||
| } |
There was a problem hiding this comment.
Add division-by-zero check.
The division operation will throw an ArithmeticException if b is zero. This must be handled to prevent runtime crashes.
Apply this diff to add validation:
class Div extends Value
{
int getResult(){
+ if (b == 0) {
+ throw new IllegalArgumentException("Cannot divide by zero");
+ }
return a/b;
}
}🤖 Prompt for AI Agents
In LCAPP.java around lines 30 to 35, the Div.getResult() method performs a/b
without checking for division by zero; add a guard that checks if b == 0 and, if
so, throw a clear ArithmeticException (or IllegalArgumentException) with a
descriptive message; otherwise perform and return the division. Ensure the
method's visibility/signature remains appropriate and no unchecked divide
occurs.
| public class LCAPP | ||
| { | ||
| public static void main(String x[]) | ||
| { | ||
| Calculator c = new Calculator(); | ||
| Value v=null; | ||
| v=new Add(); | ||
| v.setValue(10,20); | ||
| c.performOperation(v,"Addition"); | ||
| v=new Mul(); | ||
| v.setValue(5,4); | ||
| c.performOperation(v,"Multiplication"); | ||
|
|
||
| v=new Sub(); | ||
| v.setValue(10,5); | ||
| c.performOperation(v,"Substraction"); | ||
|
|
||
| v=new Div(); | ||
| v.setValue(10,2); | ||
| c.performOperation(v,"Division"); | ||
| } | ||
| } No newline at end of file |
There was a problem hiding this comment.
Fix typo in operation label.
Line 59 has "Substraction" which should be "Subtraction". This is user-facing output and should be corrected.
Apply this diff to fix the typo:
v=new Sub();
v.setValue(10,5);
- c.performOperation(v,"Substraction");
+ c.performOperation(v,"Subtraction");📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| public class LCAPP | |
| { | |
| public static void main(String x[]) | |
| { | |
| Calculator c = new Calculator(); | |
| Value v=null; | |
| v=new Add(); | |
| v.setValue(10,20); | |
| c.performOperation(v,"Addition"); | |
| v=new Mul(); | |
| v.setValue(5,4); | |
| c.performOperation(v,"Multiplication"); | |
| v=new Sub(); | |
| v.setValue(10,5); | |
| c.performOperation(v,"Substraction"); | |
| v=new Div(); | |
| v.setValue(10,2); | |
| c.performOperation(v,"Division"); | |
| } | |
| } | |
| public class LCAPP | |
| { | |
| public static void main(String x[]) | |
| { | |
| Calculator c = new Calculator(); | |
| Value v=null; | |
| v=new Add(); | |
| v.setValue(10,20); | |
| c.performOperation(v,"Addition"); | |
| v=new Mul(); | |
| v.setValue(5,4); | |
| c.performOperation(v,"Multiplication"); | |
| v=new Sub(); | |
| v.setValue(10,5); | |
| c.performOperation(v,"Subtraction"); | |
| v=new Div(); | |
| v.setValue(10,2); | |
| c.performOperation(v,"Division"); | |
| } | |
| } |
🤖 Prompt for AI Agents
In LCAPP.java around lines 44 to 65, the user-facing label passed for the
subtraction operation is misspelled as "Substraction"; change that string to
"Subtraction" so the output displays the correct spelling when calling
c.performOperation for the subtraction case.
1 participant
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