Java数组拼接字符串？

Question

Java在main方法中定义一个字符串数组abcdefghi，然后再method方法中将它们拼接成一个字符串，并将字符串长度及拼接的字符串打印，代码该怎么写？求大神救救我这个小白吧

Answer 1

1、代码如下

public static void main(String[] args) {

    String str[]={"a","b","c","d","e","f","g","h","i"};

    System.out.println("字符串数组长度：" + str.length);

    System.out.println("拼接后的字符串长度：" + method(str).length());

    System.out.println("拼接后的字符串："+method(str));

}

public static String method(String [] str){

    String rs="";

    for (String s : str) {

        rs+=s;

    }

    return rs;

}

2、效果如图

Answer 2

public class Test {

public static void main(String[] args){

String[] str={"a","b","c","d","e","f","g","h","i"};//定义字符串数组

method(str);

}

private static void method(String[] s){
if(s==null)
return;
StringBuffer sBuffer=new StringBuffer();
for(int i=0;i<s.length;i++){//将数组拼接成字符串
sBuffer.append(s[i]);
}

System.out.println("字符串长度："+sBuffer.length());
System.out.println("拼接的字符串："+sBuffer.toString());
}
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