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How To Compare Long In Java? Update

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How To Compare Long In Java
How To Compare Long In Java

Table of Contents

Can you compare longs in java?

equals() is a built-in function in java that compares this object to the specified object. The result is true if and only if the argument is not null and is a Long object that contains the same long value as this object. It returns false if both the objects are not same.

How do you use compareTo for long?

Example 1
  1. import java.util.Scanner;
  2. public class JavaLongcompareToExample1 {
  3. public static void main(String[] args) {
  4. Long doy = 2018l;
  5. Scanner scanner = new Scanner(System.in);
  6. System.out.print(“Enter your birth year : “);
  7. Long userAge = scanner.nextLong();
  8. int com = doy.compareTo(userAge);

Java String Comparison Tutorial (Equals vs == in Java)

Java String Comparison Tutorial (Equals vs == in Java)
Java String Comparison Tutorial (Equals vs == in Java)

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Images related to the topicJava String Comparison Tutorial (Equals vs == in Java)

Java String Comparison Tutorial (Equals Vs == In Java)
Java String Comparison Tutorial (Equals Vs == In Java)

Can we use == to compare long in java?

Long is a wrapper class for the primitive type long. Since they are objects and not primitive values, we need to compare the content of Long instances using . equals() instead of the reference comparison operator (==). In some cases, we may get the idea that == is okay, but looks are deceiving.

How do you compare two long variables in java?

There are following ways to do it.
  1. type cast both objects into primitive values and compare (long)val3 == (long)val4.
  2. read value of object and compare val3.longValue() == val4.longValue()
  3. Use equals() method on object comparison.

How do you convert long to string?

Let’s see the simple example of converting long to String in java.
  1. public class LongToStringExample2{
  2. public static void main(String args[]){
  3. long i=9993939399L;
  4. String s=Long.toString(i);
  5. System.out.println(s);
  6. }}

What is long in Java?

long: The long data type is a 64-bit two’s complement integer. The signed long has a minimum value of -263 and a maximum value of 263-1. In Java SE 8 and later, you can use the long data type to represent an unsigned 64-bit long, which has a minimum value of 0 and a maximum value of 264-1.

How do you compare two primitive long values in Java?

In java:
  1. the == operator tells you if the two operands are the same object (instance).
  2. the . equals() method on Long tells you if they are equal in value.

Can we compare int and long in Java?

@WeishiZeng: Yes, absolutely. Both operands in a + 1 are int – so that addition happens in int arithmetic, then the conversion to long , then the comparison.

How do you compare long to zero?

We can use the following two methods to compare two long type value. int compareTo(Long anotherLong) compares two Long objects numerically.

Compare two long values.
Value Meaning
if this Long is equal to the argument Long;
less than 0 if this Long is numerically less than the argument Long;

Is Long a primitive type in java?

Primitive Data Types. The eight primitives defined in Java are int, byte, short, long, float, double, boolean and char. These aren’t considered objects and represent raw values.

How do you know if a long value is null?

If it is Long object then You can use longValue == null or you can use Objects. isNull(longValue) method in Java 7+ projects .

What is the difference between compareTo and equals in java?

The 2 main differences are that: equals will take any Object as a parameter, but compareTo will only take Strings. equals only tells you whether they’re equal or not, but compareTo gives information on how the Strings compare lexicographically.

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Java 54 – Xây dựng phương thức so sánh compareTo và hiểu rõ về Comparable trong Java

Java 54 – Xây dựng phương thức so sánh compareTo và hiểu rõ về Comparable trong Java
Java 54 – Xây dựng phương thức so sánh compareTo và hiểu rõ về Comparable trong Java

Images related to the topicJava 54 – Xây dựng phương thức so sánh compareTo và hiểu rõ về Comparable trong Java

Java 54 - Xây Dựng Phương Thức So Sánh Compareto Và Hiểu Rõ Về Comparable Trong Java
Java 54 – Xây Dựng Phương Thức So Sánh Compareto Và Hiểu Rõ Về Comparable Trong Java

How do you convert long to int?

Let’s see the simple code to convert Long to int in java.
  1. public class LongToIntExample2{
  2. public static void main(String args[]){
  3. Long l= new Long(10);
  4. int i=l.intValue();
  5. System.out.println(i);
  6. }}

What is a byte data type?

The BYTE data type stores any kind of binary data in an undifferentiated byte stream. Binary data typically consists of digitized information, such as spreadsheets, program load modules, digitized voice patterns, and so on. The term simple large object refers to an instance of a TEXT or BYTE data type.

What does the compareTo method do in java?

The compareTo() method compares two strings lexicographically. The comparison is based on the Unicode value of each character in the strings. The method returns 0 if the string is equal to the other string.

Can we use long long in Java?

Nope, there is not. You’ll have to use the primitive long data type and deal with signedness issues, or use a class such as BigInteger .

How do I convert long to String in Java?

Java Long to String
  1. Using + operator. This is the easiest way to convert long to string in java. …
  2. Long. toString() …
  3. String.valueOf() long l = 12345L; String str = String.valueOf(l); // str is ‘12345’
  4. new Long(long l) …
  5. String.format() …
  6. DecimalFormat. …
  7. StringBuilder, StringBuffer.

How do you find the length of a String in Java?

String Class
  1. String Length in Java. String length returns the number of characters in a string.
  2. Syntax. int length = stringName.length();
  3. Notes. Spaces count as characters.
  4. Example. String name = “Anthony”; int nameLength = name.length(); System.out.println(“The name ” + name + ” contains ” + nameLength + “letters.”);

How do you use long value in Java?

To initialize long you need to append “L” to the end. It can be either uppercase or lowercase. All the numeric values are by default int . Even when you do any operation of byte with any integer, byte is first promoted to int and then any operations are performed.

How do you use long in Java?

Let’s see an example to use long data type with positive and negative value.
  1. public class LongExample1.
  2. {
  3. public static void main(String…k)
  4. {
  5. long num1=10L;
  6. long num2=-10L;
  7. System.out.println(“num1: “+num1);
  8. System.out.println(“num2: “+num2);

Can long have decimals?

Large Integers

Long variables can hold numbers from -9,223,372,036,854,775,808 through 9,223,372,036,854,775,807. Operations with Long are slightly slower than with Integer . If you need even larger values, you can use the Decimal Data Type.

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What is unboxing and Autoboxing in Java?

Autoboxing is the automatic conversion that the Java compiler makes between the primitive types and their corresponding object wrapper classes. For example, converting an int to an Integer, a double to a Double, and so on. If the conversion goes the other way, this is called unboxing.


Java Nâng Cao 08 Comparable để so sánh và sắp xếp đối tượng trong List Java

Java Nâng Cao 08 Comparable để so sánh và sắp xếp đối tượng trong List Java
Java Nâng Cao 08 Comparable để so sánh và sắp xếp đối tượng trong List Java

Images related to the topicJava Nâng Cao 08 Comparable để so sánh và sắp xếp đối tượng trong List Java

Java Nâng Cao 08 Comparable Để So Sánh Và Sắp Xếp Đối Tượng Trong List Java
Java Nâng Cao 08 Comparable Để So Sánh Và Sắp Xếp Đối Tượng Trong List Java

How do you compare primitive data types in Java?

2. == and != Operators
  1. 2.1. Primitives. For primitive types, being the same means having equal values: assertThat(1 == 1). isTrue(); …
  2. 2.2. Objects. Let’s say we want to compare two Integer wrapper types with the same value: Integer a = new Integer(1); Integer b = new Integer(1); assertThat(a == b). isFalse();

How do we compare objects to each other how do we compare primitives to each other?

Primitives are passed by value, i.e. a copy of the primitive itself is passed. Whereas for objects, the copy of the reference is passed, not the object itself. Primitives are independent data types, i.e. there does not exist a hierarchy/super class for them. Whereas every Object is descendent of class “Object”.

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