Use String.strip() instead of using String.trim

Medium

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Java

String.trim() only removes whitespace (space, tab, etc.) defined by the ASCII character set. String.strip() removes all kinds of whitespace including Unicode

Examples

Example 1:

Positive

Correct implementation following the practice.

package org.example;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public final class Util {

    public static Map<String, Integer> nameCount(List<String> names) {
        return names.stream()
                .collect(Collectors.toMap(name -> name, name -> 1, Integer::sum));

    }

    public static void printNames(List<String> names) {
        names.forEach(System.out::println);
    }

    public static Integer sum(List<Integer> numbers) {
        return numbers.stream()
                .reduce(0, Integer::sum);
    }

    public static int increment(int value) {
        return value + 1;
    }

    public static void readFile(String fileName) throws FileNotFoundException {
        try (InputStream input = new FileInputStream(fileName)) {
            // Read file
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String removeWhiteSpace(String str) {
        return str.strip();
    }
}

Negative

Incorrect implementation that violates the practice.

package org.example;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public final class Util {

    public static Map<String, Integer> nameCount(List<String> names) {
        return names.stream()
                .collect(Collectors.toMap(name -> name, name -> 1, Integer::sum));

    }

    public static void printNames(List<String> names) {
        names.forEach(System.out::println);
    }

    public static Integer sum(List<Integer> numbers) {
        return numbers.stream()
                .reduce(0, Integer::sum);
    }

    public static int increment(int value) {
        return value + 1;
    }

    public static void readFile(String fileName) throws FileNotFoundException {
        try (InputStream input = new FileInputStream(fileName)) {
            // Read file
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static String removeWhiteSpace(String str) {
        return str.trim();
    }
}