関連ワード:  cannot invoke java lang integer intvalue ()    cannot invoke java lang integer intvalue () because the return value of is null    cannot invoke java lang integer intvalue () because the return value of    cannot invoke java lang integer intvalue () because current is null    cannot invoke java lang integer intvalue () because is null    cannot invoke java lang integer intvalue () because    cannot invoke java.lang.integer.intvalue() because this.port is null    cannot invoke java.lang.integer.intvalue() because quiet period is null    cannot invoke java lang integer intvalue () because this id is null    cannot invoke java lang integer intvalue () is null  
結果 : cannot invoke java lang integer intvalue ()