Java String compareTo() 方法 Java String charAt() 方法 Java String compareTo(String anotherString) Java String compareTo() 方法 public class Test { public static void main(String args[]) { String str1 = "Strings are immutable"; String str2 = new String("Strings are immutable"); String str3 = new String("Integers are not immutable"); int result = str1.compareTo( str2 ); System.out.println(result); result = str2.compareTo( str3 ); System.out.println(result); } } Java String charAt() 方法 Java String compareTo(String anotherString)