Inconsistent behavior caused by extraction methods

[DongChunHao]

Eclipse version：2023-9

Repeat the steps：

1. select “switch (value) {....return result;”
2. click “Refactor-extract method”

class ExtractMethodTest {
private final int value;

public ExtractMethodTest(int value) {
    this.value = value;
}

public synchronized int calculate() {
    int result;
    switch (value) {
        case 1:
            result = value * 2;
            break;
        case 2:
            result = value * 3;
            break;
        default:
            result = value * 4;
            break;
    }
    return result;
}

}

refactoring result：

After extracting the method, if inline refactoring is performed, the code will be inconsistent with the original code and an additional local variable will be declared