String s1 = "abd"; int value = s.compareTo(s1); 则value的值是小于0的值,即-1; 在String类中还存在一个类似的方法compareToIgnoreCase,这个方法是忽略大小写进行比较,比较的规则和compareTo一样。例如: String s = "abc"; String s1 = "ABC"; int value = s.compareToIgnoreCase(); 则value的值...
Code: stack=4, locals=2, args_size=1 0: new #2 // class java/lang/StringBuilder 3: dup 4: invokespecial #3 // Method java/lang/StringBuilder."<init>":()V 7: new #4 // class java/lang/String 10: dup 11: ldc #5 // String a 13: invokespecial #6 // Method java/lang/Strin...
首先加载StringBuffer类,在堆中开辟存储空间,用于存储StringBuffer类的对象,接着在堆中开辟存储空间,用于存储hello字符串数组,将hello字符串数组的地址返回给StringBuffer类的成员toStringCache。 1 sb1 = sb1.append("world"); 如果添加后的字符串长度,没有超过限制容量,直接在toStringBuffer指向的存储空间的末尾添加w...
System.out.println(s1.compareTo(s2));//不同,输出字符差值-1 System.out.println(s1.compareTo(s3));//相同输出0 System.out.println(s1.compareTo(s4));//前k个字符完全相同,输出长度差值-3 } int compareToIgnoreCase(String str)方法:与compareTo方式相同,但是忽略大小写比较 源码 public static voi...
public static byte[] toBytes(char[] value, int off, int len) { byte[] val = newBytesFor(len); // byte[] 数组的长度 = len*2,因为一个 char 要占用2个 byte for (int i = 0; i < len; i++) { putChar(val, i, value[off]); // off++; } return val; } static void putCh...
private int hash; // Default to 0 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. /** * @author Gremmie102 * @date 2022/4/21 15:49 * @purpose : 比较字符串引用 */ public class StringTestDemo1 { public static void main(String[] args) { ...
每一个学过java的小伙伴都会背,StringBuffer是线程安全的,StringBuilder是非线程安全的;Hashtable是线程安全的,HashMap是非线程安全的。把这几条当成公理在用了,我面试的同学中,不管能力好坏,这几句都能背出来。 我们看一下StringBuffer的官方注释: StringBuffer is A thread-safe, mutable sequence of characters. ...
[];/** The offset is the first index of the storage that is used. */privatefinal int offset;/** The count is the number of characters in the String. */privatefinal int count;/** Cache the hash code for the string */privateint hash;// Default to 0/** use serialVersionUID from...
Returns a string representing the data in this sequence. void trimToSize() Attempts to reduce storage used for the character sequence. Methods inherited from class java.lang.Object clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait Methods inherited from interface ...
[Android.Runtime.Register("insert", "(IZ)Ljava/lang/StringBuffer;", "")] public Java.Lang.StringBuffer Insert (int offset, bool b); 參數 offset Int32 b Boolean 要插入的布爾值。 傳回 StringBuffer 屬性 RegisterAttribute 例外狀況 StringIndexOutOfBoundsException 如果為 或 index > lengt...