String的方法调用

String的方法调用

        package com.math;
        import java.util.Arrays;
        public class StringFull {
            public static void main(String[] args) {
                String st1 = "bcd";
                String stq = "abc";
                System.out.println(stq.equals(st1));
                String b1 = "abcdefg";
                //字符串的分割
                String sub = b1.substring(2);
                //字符串的分割【2，4）
                String sub1 = b1.substring(2, 4);
                System.out.println(sub);
                System.out.println(sub1);
                //toUpperCase小写转大写
                System.out.println(b1.toUpperCase());
                //大写转小写toLowerCase
                System.out.println(b1.toUpperCase().toLowerCase());
                String poo = "s-o-u-p-e-r";
                String poos = "  s up er  ";
                String[] split = poo.split("-");
                //Arrays.toString()字符串形式输出
                System.out.println(Arrays.toString(split));
                //去掉首尾空格
                String trim = poos.trim();
                System.out.println(trim);
            }
        }