【Java每日一题】20170329

20170328问题解析请点击今日问题下方的“【Java每日一题】20170329”查看(问题解析在公众号首发,公众号ID:weknow619)

package Mar2017;

public class Ques0329 {
public static void main(String[] args) {
String s1 = "abcd";
StringBuffer sb1 = new StringBuffer("abcd");
int val = 3;
System.out.println(s1 + val);
System.out.println(sb1 + val);
}
}

今日问题: 
请问主程序运行结果是什么?(点击以下“【Java每日一题】20170329”查看20170328问题解析)

题目原发布于公众号、简书:【Java每日一题】20170329【Java每日一题】20170329 (也可以扫描头像二维码查看)

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