作业帮"length:"+a.length"\n" 还有 a[i]+" "
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"length:"+a.length"\n" 还有 a[i]+" "
"length:"+a.length"\n"
还有 a[i]+" "
"length:"+a.length"\n" 还有 a[i]+" "
你这里a是一个数组
"length:"+a.length"\n"是用来拼凑字符串的
少了个+吧
应该是
"length:"+a.length+"\n"
输出结果为一个字符串
length：数组的大小
"\n"是用来换行的
\x09\x09String[] a = {"1","2"};//数组类型可以自定义
\x09\x09String str1 = "lenth:"+a.length+"\n";//拼成一个字符串
\x09\x09String str2 =a[1]+"";//数组的第二个元素变成一个字符串
\x09\x09System.out.println(str1);
\x09\x09System.out.println(str2);
输出结果为
lenth:2
2
length:+a.length
还有 a[i]+
=(a.length
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