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...
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner data = new Scanner(System.in); while (true){ System.out.print("输入:"); String num = data.next(); StringBuilder NUM = new StringBuilder(num); String re_num = NUM.reverse().toString(); ...
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();...
StringBuffer insert(int offset, xxx):在指定位置插入xxx StringBuffer reverse() :把当前字符序列逆转 public int indexOf(String str) public String substring(int start,int end) public int length() public char charAt(int n ) public void setCharAt(int n ,char ch) 当append和insert时,如果原来value...
把当前字符序列逆转str2.reverse();System.out.println(str2);//7.subString 返回一个新的字符串,它是此字符串的从bedinIndex开始截取到最后的一个子字符串StringBuffer str4 = new StringBuffer("Hello,java");String substring1 = str4.substring(3);System.out.println(substring1);//8.返回一个新字符...
Buffer对象中分别追加String类型、char类型和StringBuffer类型的数据,打印StringBuffer对象,调用delete(int start, int end)方法将指定范围的内容删除,在本例中指定索引为“5,6”,也就是将字符串中间的空格删除了,然后调用insert(int offset, String str)方法在刚删除的空格位置加上“——”,最后调用reverse()方法将...
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....
Namespace: Java.Lang Assembly: Mono.Android.dll Reverses the order of characters in this builder. C# 複製 [Android.Runtime.Register("reverse", "()Ljava/lang/StringBuilder;", "")] public Java.Lang.StringBuilder Reverse(); Returns StringBuilder Attributes RegisterAttribute Remarks Portions of...
Namespace: Java.Lang Assembly: Mono.Android.dll Reverses the order of characters in this builder. [Android.Runtime.Register("reverse", "()Ljava/lang/StringBuilder;", "")] public Java.Lang.StringBuilder Reverse (); Returns StringBuilder Attributes RegisterAttribute Remarks Portions of this ...
= 0) {int k = a.charAt(0) - '0';if (k >= 0 && k <= 9) {a.reverse();}}ans.append(a.toString() + " ");a = new StringBuilder();} else {//字符串不是空格char x = c[i];// 判断是不是字母if ((c[i] >= 'a' && c[i] <= 'z') || (c[i] >= 'A' && c...