Java中十六进制和十进制之间互相转换代码示例

public static void main(String [] args) {
        Scanner input  = new Scanner(System.in);
        while(input.hasNextInt()){
            Integer a = input.nextInt();
            System.out.println("数字"+a+"的十六进制为："+a.toHexString(a));
        }
    }

public static void main(String [] args) {
        Scanner input  = new Scanner(System.in);
        while(input.hasNextInt()){
            Integer a = input.nextInt();
            System.out.println("数字"+a+"的十六进制为："+"0x"+a.toHexString(a));
        }
    }

public static void main (String [] args){
        Scanner input  = new Scanner(System.in);
        while (input.hasNextLine()){
            String str = input.nextLine();
            if(str.substring(0,2).equals("0x")){
                System.out.println("有符号十六进制数："+str+"转为十进制的值为："+Integer.parseInt(str.substring(2),16));
            }else {
                System.out.println("无符号十六进制数："+str+"转为十进制的值为："+Integer.parseInt(str,16));
            }
        }
    }