public static void addStudent(ArrayList<student>array) { Scanner sc = new Scanner(System.in); String sid; while (true) { System.out.println("请输入学生的学号"); sid = sc.nextLine(); boolean flag = isUsed(array, sid); if (flag) { System.out.println("你输入的学号已被使用,请重新输入...
底层调用indexOf实现，可读性更好。示例：String str = "Java is fun";boolean result = str.contains("fun"); // true 适用于简单存在性检查，无需关心具体位置时优先使用。startsWith与endsWith方法 检查字符串是否以特定前缀开头或后缀结尾，支持指定起始位置。示例：String str = "example.png";
截取子串用substring()。substring(2)从索引2切到末尾，比如"banana".substring(2)得到"nana"。substring(1,4)切索引1到3（不包括4），比如"orange".substring(1,4)返回"ran"。要当心结束索引超限的情况。比较字符串内容必须用equals()，别用==。比如newString("test").equals("test")返回true，而用==比较...
public class StringSub { publicstatic void main(String[] args) { Stringstr = "为革命保护视力,眼保健操开始!"; Stringsubstr = str.substring(8); //从第8位开始截取字符串 System.out.println("字符串str的后半句是:"+ substr); } } 1. 2. 3. 4. 5. 6. 7. 结果: 字符串str的后半句是...
JavaString.endsWith()is used to check the suffix of a given string. It verifies if the given string ends with the argument string or not. To check if a string starts with a specified substring, usestartsWith()method. Note that using the regular expression is also an effective way tocheck...
* 类名首字母小写 作为spring容器beanMap的key */publicstaticStringtransformName(String className){String tmpstr=className.substring(className.lastIndexOf(".")+1);returntmpstr.substring(0,1).toLowerCase()+tmpstr.substring(1);}}
String substring(int beginIndex, int endIndex) //char at endIndex NOT included; to the end if endIndex is missing String toLowerCase() String toUpperCase() boolean equals(String str) //to check whether two String object contain exactly the same characters in the same order ...
PathMatcher pathMatcher=newAntPathMatcher();//这是我们的请求路径 需要被匹配(理解成匹配controller吧 就很容易理解了)String requestPath="/user/list.htm?username=aaa&departmentid=2&pageNumber=1&pageSize=20";//请求路径//路径匹配模版String patternPath="/user/list.htm**";assertTrue(pathMatcher.match...
D)if (s.endsWith("Java")) ... E)if (s.substring(s.length() - 4).equals("Java")) ...9)What is displayed by the following code?public static void main(String[ ] args) throws Exception { String[ ] tokens = "Welcome to Java".split("o"); for (int i = 0; i < tokens....
String abiList=null;for(int i=1;i<argv.length;i++){if("start-system-server".equals(argv[i])){startSystemServer=true;}elseif(argv[i].startsWith(ABI_LIST_ARG)){abiList=argv[i].substring(ABI_LIST_ARG.length());}elseif(argv[i].startsWith(SOCKET_NAME_ARG)){socketName=argv[i]....