Konversi String ke Bilangan (Integer, Double, Biner, Heksadesimal) dalam Java

/**
 *
 * @author x86
 */
public class string {
    public static void main(String hx[]){

        String str0 = "12345";
        String str1 = "12345.5";
        String str2 = "Hello World!";

        //String ke integer
        System.out.println("String ke Integer");
        System.out.println("=================");
        try{
            int Int0 = Integer.parseInt(str0);
            System.out.println("Integer : "+Int0);
        }catch(Exception s){
            System.out.println(str0+" Tidak bisa diconvert ke Integer.");
        }
        try{
            int Int1 = Integer.parseInt(str1);
            System.out.println("Integer : "+Int1);
        }catch(Exception s){
            System.out.println(str1+" Tidak bisa diconvert ke Integer.");
        }
        try{
            int Int2 = Integer.parseInt(str2);
            System.out.println("Integer : "+Int2);
        }catch(Exception s){
            System.out.println(str2+" Tidak bisa diconvert ke Integer.");
        }
        System.out.println();

        //String ke double
        System.out.println("String ke Double");
        System.out.println("=================");
        try{
            double Dou0 = Double.parseDouble(str0);
            System.out.println("Double : "+Dou0);
        }catch(Exception s){
            System.out.println(str0+" Tidak bisa diconvert ke Double.");
        }
        try{
            double Dou1 = Double.parseDouble(str1);
            System.out.println("Double : "+Dou1);
        }catch(Exception s){
            System.out.println(str1+" Tidak bisa diconvert ke Double.");
        }
        try{
            double Dou2 = Double.parseDouble(str2);
            System.out.println("Double : "+Dou2);
        }catch(Exception s){
            System.out.println(str2+" Tidak bisa diconvert ke Double.");
        }
        System.out.println();

        //String ke biner
        System.out.println("String ke Biner");
        System.out.println("=================");
        String bin0 = "";
        byte[] bytes = str0.getBytes();
        for(byte b : bytes){
            bin0 = bin0 + Integer.toBinaryString(b)+" ";
        }
        System.out.println(str0+" : "+bin0);

        String bin1 = "";
        bytes = str1.getBytes();
        for(byte b : bytes){
            bin1 = bin1 + Integer.toBinaryString(b)+" ";
        }
        System.out.println(str1+" : "+bin1);

        String bin2 = "";
        bytes = str2.getBytes();
        for(byte b : bytes){
            bin2 = bin2 + Integer.toBinaryString(b)+" ";
        }
        System.out.println(str2+" : "+bin2);
        System.out.println();

        System.out.println("String ke Hexa");
        System.out.println("=================");
        String hex0 = "";
        bytes = str0.getBytes();
        for(byte b : bytes){
            hex0 = hex0 + Integer.toHexString(b)+" ";
        }
        System.out.println(str0+" : "+hex0);

        String hex1 = "";
        bytes = str1.getBytes();
        for(byte b : bytes){
            hex1 = hex1 + Integer.toHexString(b)+" ";
        }
        System.out.println(str1+" : "+hex1);

        String hex2 = "";
        bytes = str2.getBytes();
        for(byte b : bytes){
            hex2 = hex2 + Integer.toHexString(b)+" ";
        }
        System.out.println(str2+" : "+hex2);
    }
}

run:
String ke Integer
=================
Integer : 12345
12345.5 Tidak bisa diconvert ke Integer.
Hello World! Tidak bisa diconvert ke Integer.

String ke Double
=================
Double : 12345.0
Double : 12345.5
Hello World! Tidak bisa diconvert ke Double.

String ke Biner
=================
12345 : 110001 110010 110011 110100 110101 
12345.5 : 110001 110010 110011 110100 110101 101110 110101 
Hello World! : 1001000 1100101 1101100 1101100 1101111 100000 1010111 1101111 1110010 1101100 1100100 100001 

String ke Hexa
=================
12345 : 31 32 33 34 35 
12345.5 : 31 32 33 34 35 2e 35 
Hello World! : 48 65 6c 6c 6f 20 57 6f 72 6c 64 21 
BUILD SUCCESSFUL (total time: 0 seconds)