String firstWord = str.substring(0,firstIndex); //截取出第一个单词 String lastWord = str.substring(lastIndex+1,length);//截取出最后一个单词 System.out.println("第一个单词为:"+firstWord); System.out.println("最后一个单词为:"+lastWord); /***1、split()方法拆分出所有单词***/ String st...
String str = "Java is a popular programming language."; String[] words = str.split(" "); String searchStr = "programming"; boolean found = false; for (String word : words) { if (word.equals(searchStr)) { found = true; break; } } if (found) { System.out.println("Substring fou...
indexOf(int ch, int fromIndex)Returns the index within this string of the first occurrence of the specified character, starting the search at the specified index. indexOf(String str)Returns the index within this string of the first occurrence of the specified substring. indexOf(String str, int...
String szTemp = "小明正在学习Java编程";String szSearch = "编程";// 使用indexOf查找子串"编程"intnIndex = szTemp.indexOf(szSearch);// 若nIndex不等于-1,说明已查找到子串 if( nIndex != -1 ){ // 从szTemp截取已查找到的子串 String szSub = szTemp.substring(nIndex,nIndex+szSearch....
public String substring(int beginIndex,int endIndex);诀窍:取前不取后,length = endIndex-beginIndex;"unhappy".substring(2); //happy "smiles".substring(1,5); //mile 3|44. 字符产相等比较:public boolean equals(String str); 字符串对象调用String类的equals方法,比较当前字符串对象是否与参数制定的字...
Similarily, we can search for the substring between indices 2 to 8. Assertions.assertEquals("llo Wo", str.substring(2, 8)); 2.2. Using only beginIndex When we do not pass the endIndex argument, the substring is taken up to the last character of the string. In other words, if not spe...
substring(1); } // 用下划线将原始字符串分割 String[] camels = name.split("_"); for (String camel : camels) { // 跳过原始字符串中开头、结尾的下换线或双重下划线 if (camel.isEmpty()) { continue; } // 首字母大写 result.append(camel.substring(0, 1).toUpperCase()); result.append(...
publicclassDatabaseSearchimplementsSearch{@OverridepublicList<String>searchDoc(String keyword){System.out.println("数据搜索 "+keyword);returnnull;}} resources 接下来可以在resources下新建META-INF/services/目录,然后新建接口全限定名的文件:com.cainiao.ys.spi.learn.Search,里面加上我们需要用到的实现类 ...
System.out.println("abc"); String cde = "cde"; System.out.println("abc" + cde); String c = "abc".substring(2,3); String d = cde.substring(1, 2); The class String includes methods for examining individual characters of the sequence, for comparing strings, for searching strings, fo...
System.out.println("abc"); String cde = "cde"; System.out.println("abc" + cde); String c = "abc".substring(2,3); String d = cde.substring(1, 2); </blockquote> The class String includes methods for examining individual characters of the sequence, for comparing strings, for searc...