Java程序示例，展示十六进制的使用方法

// Java program to convert a decimal
// number into a hexadecimal number
import java.io.*;
public class DectoHexadecimal {
	// method to convert decimal to hexadecimal number system
	static void decToHexa(int num)	{
		// char array that stores the hexadecimal number
		char[] hexaDec = new char[100];
		int j = 0;
		while (num != 0) {
			// temporary variable to store the remainder
			int t = 0;
			// storing the remainder in the temp variable.
			t = num % 16;
			// check if temp < 10
			if (t < 10) {
				hexaDec[j] = (char)(t + 48);
				j++;
			} else {
				hexaDec[j] = (char)(t + 55);
				j++;
			}

			num = num / 16;
		}
		// hexadecimal number array in reverse order
	
		for (int k = j - 1; k >= 0; k--)
			System.out.print( hexaDec[k]);
	}
	public static void main(String[] args){
		int num = 4698;
		System.out.print("Hexadecimal equivalent of " +num+ " is " );
		decToHexa(num);
	}
}

Hexadecimal equivalent of 4698 is 125A

// Java Program to demonstrate the Usage of HexaDecimal
import java.io.*;
public class DecimaltoHex {
	// Main  method
	public static void main(String[] args){
		//Decimal number to be converted
		int d = 986;
		// Using the toHexString() method to convert decimal value to its 
		// corresponding hexadecimal value
		String hexd = Integer.toHexString(d);
		// Displaying hexaDec value
		System.out.println("Hexadecimal value of " +d+ " is " + hexd);
	}
}

Hexadecimal value of 986 is 3da

// Java program to convert Hexadecimal numbers to corresponding Decimal number
import java.io.*;
public class HexToDecimal {
	// Main method
	public static void main(String[] args)	{
		// Random Hexadecimal number stored in a string
		String hexd = "4B6A";
		// Passing hexd and base 16 as parameters
		// to parseInt method
		int dec = Integer.parseInt(hexd, 16);
		// Displaying the corresponding
		// decimal value of a hexadecimal number
		System.out.println("Corresponding Decimal value of" + hexd + " is " + dec);
	}
}

Corresponding Decimal value of4B6A is 19306

// Java Program to demonstrate the Usage of HexaDecimal
import java.io.*;
public class LongToHex {
	// Main method
	public static void main(String[] args)	{
		// Long number to be converted 
		long l = 2028;
		// Storing the result in a string hexd
		String hexd = Long.toHexString(l);
		// Displaying the corresponding hexadecimal value
		System.out.println("Corresponding Hex value of long number " +l+ " is " + hexd);
	}
}

Corresponding Hex value of long number 2028 is 7ec

// Java Program to Illustrate the Usage of HexaDecimal by converting a hexadecimal value into long value
import java.io.*;
public class HexToLong {
    // Main method
    public static void main(String[] args) {
        // Hexadecimal number to be converted
        String hs = "7850";
        // passing hs and base 16 as parameters
        //  to parseLong function
        long l = Long.parseLong(hs, 16);
        // Displaying the corresponding hexadecimal value
        System.out.println("Corresponding Long value of hexadecimal no. " +hs+ " is " + l);
    }
}

Corresponding Long value of hexadecimal no. 7850 is 30800