substring(5, 8)); } } Java Copy输出:String contains = GeeksForGeeks SubSequence = For Java Copy例2: 演示StringIndexOutOfBoundsException// Java program to demonstrate // Exception thrown by the substring() Method. class GFG { public static void main(String[] args) { // create a ...
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AI代码解释 /** * Appends the specified string to this character sequence. * * The characters of the {@code String} argument are appended, in * order, increasing the length of this sequence by the length of the * argument. If {@code str} is {@code null}, then the four * character...
1: invokespecial #1// Method java/lang/Object."<init>":()V 4:return publicstaticvoidmain(java.lang.String[]); Code: 0: ldc #2// String aaa 2: astore_1 3:new#3// class java/lang/StringBuilder 6: dup 7: invokespecial #4// Method java/lang/StringBuilder."<init>":()V ...
At any point in time it contains some particular sequence of characters, but the length and content of the sequence CAN BE CHANGED through certain method calls. Appendable:An object to which char sequences and values can be appended. 数据结构 String final 型byte数组,不可修改性的源头。
boolean contains(str); //特殊之处:indexOf(str)可以索引str第一次出现的位置,如果返回-1表示该str不在字符串中存在。所以,也可以用于对指定判断是否包含。如:if(str.indexOf(“aa”)!=-1)而且该方法既可以判断,又可以获取出现的位置。如果只为判断,用contains。
[Android.Runtime.Register("compareTo", "(Ljava/lang/StringBuilder;)I", "", ApiSince=34)] public int CompareTo (Java.Lang.StringBuilder another); Parameters another StringBuilder the StringBuilder to be compared with Returns Int32 the value 0 if this StringBuilder contains the same character ...
* When the intern method is invoked, if the pool already contains a * string equal to this {@code String} object as determined by * the {@link #equals(Object)} method, then the string from the pool is * returned. Otherwise, this {@code String} object is added to the ...
Java StringBuilder.substring() returns a new String that contains a subsequence of characters, formed using start position and an optional end position, contained in this character sequence. In this tutorial, we will learn about the Java StringBuilder.su
This sequence is altered to represent a new character sequence that is identical to the old character sequence, except that it contains the character ch at position index. The index argument must be greater than or equal to 0, and less than the length of this sequence. Java documentation for...