How To Convert String To Integer In Java?

`int num = Integer.parseInt(“123”);`

`Integer num = Integer.valueOf(“123”);`

`int num = Integer.parseInt(str.trim());`

`int num = Integer.parseInt(str, 10);`

`int num = Integer.decode(“123”);`

`long num = Long.parseLong(“123”);`

`BigInteger num = new BigInteger(“123”);`