7.11 字符串比较

demo1 equals equalsIgnoreCase

        String strA = "mldn";
        String strB = "MLDN";
        System.out.println(strA.equals(strB));
        System.out.println(strA.equalsIgnoreCase(strB));// 不区分大小写来比较

demo2 compareTo 字符串大小比较,compareToIgnoreCase

• 这个方法很重要，返回结果 正数，0，负数

public class HelloWorld {
    public static void main(String args[]){// String args[]字符串数组的意思

        String strA = "m";
        String strB = "M";
        System.out.println(strA.compareTo(strB));// 32 
        System.out.println(strB.compareTo(strA));// -32 
        System.out.println("Hello".compareTo("Hello"));//0

        System.out.println(strA.compareToIgnoreCase(strB));// 0 不计较大小写,结果一样的;

    }
}