範例

public class ClassA {{
private int i = 1;
private int i2 = 0;

public void method(){
i2 ++;
}
}

解決方案
在宣告之後絕不指派 private 欄位,應該將它宣告為 final
public class ClassA {
private final int i = 1;
private int i2 = 0;

public void method(){
i2 ++;
}
}