我如何在 Java 中使用字符的 equals() 方法

Question

由于字符串是一个对象，所以需要使用该string.equals(string)方法来确认两个字符串是否相等。但是，为什么要使用==来检查两个字符是否相等char1 == char2，而不是char1.equals(char2)？

Answer 1

也许，这将有助于理解==vs的区别equals。

  @Test

  public void testCharacterEquals() {

    //primitive type uses == operator for equals comparasion

    char a1 = 'A';

    char a2 = 'A';

    if (a1 == a2) {

      System.out.println("primitive type comparasion: it's equal");

    }

    //From Java doc; The Character class wraps a value of the primitive type char in an object. An object of type Character contains a single field whose type is char.

    //Object type uses equals method for equals comparasion

    Character character1 = 'A';

    Character character2 = 'A';

    if (character1.equals(character2)) {

      System.out.println("object type comparasion: it's equal");

    }

  }