Check out example codes for "toString convert to long". It will help you in understanding the concepts better.

Code Example 1

long l = 12345L;
String str = DecimalFormat.getNumberInstance().format(l);
System.out.println(str); //str is '12,345'
//if you don't want formatting
str = new DecimalFormat("#").format(l);
System.out.println(str); //str is '12345'

Code Example 2

long l = 12345L;
String str = Long.toString(l);
System.out.println(str); //prints '12345'

Code Example 3

long l = 369L;
String s = String.format("%d", l);

Code Example 4

long number = 45;
System.out.println(Long.toBinaryString(number)); //101101
System.out.println(Long.toOctalString(number)); //55
System.out.println(Long.toHexString(number)); //2d
System.out.println(Long.toString(number, 5)); //140

Code Example 5

long l = 12345L;
//deprecated from Java 9, use valueOf for better performance
String str = new Long(l).toString(); // str is '12345'

Code Example 6

package com.journaldev.string;

import java.text.DecimalFormat;

public class JavaLongToString {

	@SuppressWarnings("deprecation")
	public static void main(String[] args) {
		long l = 12345L;
		String str = Long.toString(l);
		System.out.println(str);

		str = String.valueOf(l);
		System.out.println(str);

		// deprecated from Java 9, use valueOf for better performance
		str = new Long(l).toString();
		System.out.println(str);

		str = String.format("%d", l);
		System.out.println(str);

		str = l + "";
		System.out.println(str);

		str = DecimalFormat.getNumberInstance().format(l);
		System.out.println(str);

		str = new DecimalFormat("#").format(l);
		System.out.println(str);

		str = new StringBuilder().append(l).toString();
		System.out.println(str);
	}
}

Code Example 7

long l = 12345L;
String str = String.valueOf(l); // str is '12345'

Code Example 8

long l = 12345L;
String str = new StringBuilder().append(l).toString();

Code Example 9

long l = 0x11L;
String str = Long.toString(l);
System.out.println(str); //prints '17'
l = 011L;
str = Long.toString(l);
System.out.println(str); //prints '9'

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