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Java 字符串方法equals，equalsIgnoreCase，compareTo和regionMatches。

欢马劈雪

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字符串方法equals，equalsIgnoreCase，compareTo和regionMatches。

实例源码：

源代码：

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public class Main

{/* from 时 代 J     a    v  a - nowjava.com*/

public static void main(String[] args)

{

String s1 = new String("hello"); // s1 is a copy of "hello"

String s2 = "this is a test";

String s3 = "Happy Birthday";

String s4 = "happy birthday";

System.out.printf(

"s1 = %s\ns2 = %s\ns3 = %s\ns4 = %s\n\n", s1, s2, s3, s4);

// test for equality

if (s1.equals("hello"))  // true
      /*来自 
       时 代 J a v a 公 众 号 - nowjava.com*/

System.out.println("s1 equals \"hello\"");

else

System.out.println("s1 does not equal \"hello\"");

// test for equality with ==

if (s1 == "hello")  // false; they are not the same object

System.out.println("s1 is the same object as \"hello\"");

else

System.out.println("s1 is not the same object as \"hello\"");

// test for equality (ignore case)

if (s3.equalsIgnoreCase(s4))  // true

System.out.printf("%s equals %s with case ignored\n", s3, s4);

else

System.out.println("s3 does not equal s4");

// test compareTo

System.out.printf(

"\ns1.compareTo(s2) is %d", s1.compareTo(s2));

System.out.printf(

"\ns2.compareTo(s1) is %d", s2.compareTo(s1));

System.out.printf(

"\ns1.compareTo(s1) is %d", s1.compareTo(s1));

System.out.printf(

"\ns3.compareTo(s4) is %d", s3.compareTo(s4));

System.out.printf(

"\ns4.compareTo(s3) is %d\n\n", s4.compareTo(s3));

// test regionMatches (case sensitive)

if (s3.regionMatches(0, s4, 0, 5))

System.out.println("First 5 characters of s3 and s4 match");

else

System.out.println(
/**代码未完, 请加载全部代码(NowJava.com).**/

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本文系作者在时代Java发表，未经许可，不得转载。如有侵权，请联系nowjava@qq.com删除。

编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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