length : 用于字符串数组长度
length() : 用于字符串长度
size() : 用于List集合
String[] strArr = new String[] {"gyhjk","jklk"};
String str = "hyjkk";
List<String> strList = new ArrayList();
strList.add("eff");
strList.add("uio");
strList.add("fdjk");
int strArrLen = strArr.length;
int strLen = str.length();
int strListLen = strList.size();
System.out.println("字符串数组长度:" + strArrLen);
System.out.println("字符串长度:" + strLen);
System.out.println("List字符串长度:" + strListLen);
注意事项:
/这里要将strArr.length赋给一个变量,不然会报错
Syntax error, insert “VariableDeclarators” to complete LocalVariableDeclaration
结果: