importjava.util.Scanner;importnet.sourceforge.pinyin4j.PinyinHelper;publicclassMain{publicstaticvoidmain(String[]args){Scannerscanner=newScanner(System.in);System.out.print("请输入一个字符串:");Stringinput=scanner.ne
As we can see, we only want the first character, ‘h‘, to be changed into ‘H‘. However,the remaining characters shouldn’t be modified. Of course, if the input string is empty, the result should be an empty string too: String EMPTY_INPUT = ""; String EMPTY_EXPECTED = ""; In ...
publicclassMain{publicstaticvoidmain(String[]args){Stringchinese="中国";charfirstLetter=getFirstLetter(chinese);System.out.println("The first letter of "+chinese+" is: "+firstLetter);}publicstaticchargetFirstLetter(Stringchinese){charfirstLetter=chinese.charAt(0);returnCharacter.toUpperCase(firstLetter)...
参数为StringBuffer的有参构造方法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /** * 参数类型为StringBuffer,将StringBuffer值数组拷贝给String的值数组 * 线程安全的 **/ public String(StringBuffer buffer) { synchronized(buffer) { this.value = Arrays.copyOf(buffer.getValue(), buffer.length(...
总结:封装类的ParseXxx;String类的valueOf,getBytes,toCharArray,getChars;String类的构造器是”万能“的。涉及到字符串与其他类型的转换时,考虑String和封装类的方法。 1.1.4 几个小算法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 // 1.模拟一个trim方法,去除字符串两端的空格。 public static String ...
(1)one-char String and this character is not one of the RegEx's meta characters ".$|()[{^?*+\\", or (2)two-char String and the first char is the backslash and the second is not the ascii digit or ascii letter. */char ch =0;if(((regex.value.length==1&&".$|()[{^?*+...
(1)one-char String and this character is not one of the RegEx's meta characters ".$|()[{^?*+\\", or (2)two-char String and the first char is the backslash and the second is not the ascii digit or ascii letter.*/charch = 0;if(((regex.value.length == 1 && ...
一、String实现源码分析 1、String的定义 复制 publicfinal class String implements java.io.Serializable, Comparable, CharSequence 1. 从上,我们可以看出几个重点: String是一个final类,既不能被继承的类 String类实现了java.io.Serializable接口,可以实现序列化 ...
public int firstUniqChar(String s) { char[] chs = s.toCharArray(); int[] freq = ...
public String(char[] value, int offset, int count) Allocates a new String that contains characters from a subarray of the character array argument. The offset argument is the index of the first character of the subarray and the count argument specifies the length of the subarray. The con...