関連ワード:  convert string to long in java 8    convert list of string to long java 8    convert string to localdatetime in java 8    convert string to date in java 8    convert string to uppercase in java 8    convert string to map in java 8    convert string to array in java 8    convert string to localdate in java 8    convert string to stream in java 8    convert string to list in java 8