Better Strings - Java String Interpolation

The Java Plugin to use string interpolation for Java (like in Kotlin). Supports Java 8, 9, 10, 11, …

1. Motivation

In the latest JEPs https://openjdk.java.net/jeps/355, we have the only expectation of the RAW string literals, but there is nothing about the string interpolation.

And it’s so sad, that we need writing code like this in the 2020 year:

int a = 3;
int b = 4;
System.out.println(a + " + " + b + " = " + (a + b));

just to print the string: 3 + 4 = 7

of course, we can use a var since Java 10:

var a = 3;
var b = 4;
System.out.println(a + " + " + b + " = " + (a + b));

But this code is still sad =(

2. What can we do with the Better Strings plugin?

2.1. Using variables in string literals:

var a = 3;
var b = 4;
System.out.println("${a} + ${b} = ${a+b}");

prints: 3 + 4 = 7

2.2. Using expressions:

var a = 3;
var b = 4;
System.out.println("flag = ${a > b ? true : false}");

prints: flag = false

var a = 3;
System.out.println("pow = ${a * a}");

prints: pow = 9

2.3. Using functions:

@Test
void functionCall() {
    System.out.println("fact(5) = ${factorial(5)}");
}

long factorial(int n) {
    long fact = 1;
    for (int i = 2; i <= n; i++) {
        fact = fact * i;
    }
    return fact;
}

prints: fact(5) = 120

3. Getting started

You need to add the following dependency:

<dependency>
    <groupId>com.antkorwin</groupId>
    <artifactId>better-strings</artifactId>
    <version>0.1</version>
</dependency>

And you can use string interpolation anywhere in your code.

4. How to turn-off string interpolation

To skip the string interpolation for class, method or field you can use the @DisabledStringInterpolation annotation:

@DisabledStringInterpolation
class Foo {
    void test() {
        System.out.println("${a+b}");
    }
}

this code prints: ${a+b}

5. How it works

Better Strings is a Java Annotation Processor, but it does not process specific annotations, it makes AST modification of your code while javac compiling it.

apploidx / better-strings Goto Github PK

better-strings's Introduction

Better Strings - Java String Interpolation

1. Motivation

2. What can we do with the Better Strings plugin?

2.1. Using variables in string literals:

2.2. Using expressions:

2.3. Using functions:

3. Getting started

4. How to turn-off string interpolation

5. How it works

better-strings's People

Contributors

Stargazers

Watchers

Recommend Projects

React

Vue.js

Typescript

TensorFlow

Django

Laravel

D3

Recommend Topics

javascript

web

server

Machine learning

Visualization

Game

Recommend Org

Facebook

Microsoft

Google

Alibaba

D3

Tencent