Java:String、StringBuilder、reverse反转、append拼接、遍历、统计 importjava.util.Scanner; /* * Scanner:用于获取键盘录入数据 * public String nextline():获取键盘录入字符串数据 */ publicclassScannerLearn{ publicstaticvoidmain(String[] args){ Scannersc=newScanner(System.in); System.out.println("请输入...
public StringBuilder reverse() { super.reverse(); return this; } @Override public String toString() { // Create a copy, don't share the array return new String(value, 0, count); } private void writeObject(java.io.ObjectOutputStream s) throws java.io.IOException { s.defaultWriteObject();...
String类是不可变类,即一旦一个String对象被创建后,包含在这个对象中的字符序列是不可改变的,直至这个对象销毁。 StringBuffer类则代表一个字符序列可变的字符串,可通过append、insert、reverse、setChartAt、setLength等方法改变其内容。一旦生成了最终的字符串,调用toString方法将其转变为String StringBuffer:JDK1.0开始 ...
* index k in the new character sequence is equal to the character * at index k in the old character sequence, if k is less * than n; otherwise, it is equal to the character at index * k-n in the argument {@code str}. * * @param str a string. * @return a reference to this...
Namespace: Java.Lang Assembly: Mono.Android.dll Reverses the order of characters in this builder. C# 复制 [Android.Runtime.Register("reverse", "()Ljava/lang/StringBuilder;", "")] public Java.Lang.StringBuilder Reverse(); Returns StringBuilder Attributes RegisterAttribute Remarks Portions of...
StringBuilderreverse() 导致此字符序列被序列的反向替换。 voidsetCharAt(int index, char ch) 指定索引处的字符设置为 ch。 voidsetLength(int newLength) 设置字符序列的长度。 CharSequencesubSequence(int start, int end) 返回一个新的字符序列,它是该序列的子序列。 Stringsubstring(int ...
in); String line = sc.nextLine(); String s = myReverse(line); System.out.println(s); } public static String myReverse(String s) { /* // 在方法中用StringBuilder实现字符串的反转,并把结果转成String返回 // String --- StringBuilder -- reverse() --- String StringBuilder sb = new ...
public StringBuilder reverse() Causes this character sequence to be replaced by the reverse of the sequence. If there are any surrogate pairs included in the sequence, these are treated as single characters for the reverse operation. Thus, the order of the high-low surrogates is never reversed....
reverse toString publicclassTestStringBuilder{publicstaticvoidmain(String[]args){//1.append加入元素StringBuilders1=newStringBuilder();StringBuilders2=s1.append(1);StringBuilders3=s2.append(2);s3.append(3).append(4);//链式调用System.out.println(s1);System.out.println(s3);System.out.println(s1==s3...
This reverse() method is intended to reverse the characters within the AbstractStringBuilder instance it's called on. Here's a breakdown of how it works: Initialization: It initializes a boolean variable hasSurrogate as false. Surrogate pairs are used in Java (and Unicode) to represent character...