Java中equals和==的区别

equals:比较的是两个字符串中每个字符是否相同 返回true或false

==：比较的是两个字符串是否同时引用一个地址

public class equals_compareTo {    public static void main(String[] args) {        String a = "abcd";        String b = "abcd";        String c = new String("abcd");        String d = new String("abcd");        String e = c;        String f = "absd";        System.out.println("a.equals(b): " + a.equals(b));        System.out.println("b.equals(c): " + b.equals(c));        System.out.println("a == b: " + (a == b));        System.out.println("a == c: " + (a == c));        System.out.println("c == d: " + (c == d));        System.out.println("c == e: " + (c == e));        System.out.println("f.compareTo(c): " + f.compareTo(c));        System.out.println("a.compareTo(c): " + a.compareTo(c));    }}/*a.equals(b): trueb.equals(c): truea == b: truea == c: falsec == d: falsec == e: truef.compareTo(c): 16a.compareTo(c): 0*/