equals与equalsIgnoreCase

package day08;

import com.sun.xml.internal.ws.api.model.wsdl.WSDLOutput;

public class StringDemo04 {
    public static void main(String[] args) {
        String s1 = "ABC";
        String s2 = "abc";
        String s3 = "ABC";
        //equals:比较字符串内容，区分大小写
        System.out.println(s1.equals(s2));
        System.out.println(s1.equals(s3));
        //equalsIgnoreCase:比较字符串内容，不区分大小写
        System.out.println(s1.equalsIgnoreCase(s2));
    }

}

执行结果：