1 package day08;
 2 
 3 import com.sun.xml.internal.ws.api.model.wsdl.WSDLOutput;
 4 
 5 public class StringDemo04 {
 6     public static void main(String[] args) {
 7         String s1 = "ABC";
 8         String s2 = "abc";
 9         String s3 = "ABC";
10         //equals:比较字符串内容，区分大小写
11         System.out.println(s1.equals(s2));
12         System.out.println(s1.equals(s3));
13         //equalsIgnoreCase:比较字符串内容，不区分大小写
14         System.out.println(s1.equalsIgnoreCase(s2));
15     }
16 
17 }

执行结果：