MessageFormat.format

最新推荐文章于 2022-09-15 14:11:37 发布

原创最新推荐文章于 2022-09-15 14:11:37 发布 · 658 阅读

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本文详细解析了Java中字符串的转义字符使用方法，包括双引号、括号和单引号的转义技巧，并通过实例展示了如何正确地进行字符串格式化，避免常见错误。

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https://blog.youkuaiyun.com/sinat_30160727/article/details/78075687

添加链接描述

-	转义字符	被转义中形式
左括号	{	‘{’
单引号	’	‘’
双引号	“”	‘"’ ‘"’

1.双引号

String test1 = "{0} is my frided,and {1} is my fridend.";
	    String test2 = "\"{0}\" is my frided,and \"{1}\" is my fridend.";
	    String test3 = "'\"{0}'\" is my frided,and '\"{1}'\" is my fridend.";
	    
	    Object[] argument_test1 = new Object[]{"Amy","Aliese"};
	    
	    String result_test1 = MessageFormat.format(test1, argument_test1);
	    String result_test2 = MessageFormat.format(test2, argument_test1);
	    String result_test3 = MessageFormat.format(test3, argument_test1);
	    
	    
	    System.out.println(test1+ "------->" +result_test1);
	    System.out.println(test2+ "------->" +result_test2);
	    System.out.println(test3+ "------->" +result_test3);

结果演示

在这里插入图片描述

2.括号【左括号是重点】

public static void test2() {
        String test1 = "'{'0'}' is my frided,and '{'1'}' is my fridend.";
        String test2 = "'{'{0}'}' is my frided,and '{'{1}'}' is my fridend.";
        String test3 =  "{0}} is my frided,and {1}} is my fridend.";
       // String test4 =  "{{0}} is my frided,and {{1}} is my fridend.";
        
        Object[] argument_test1 = new Object[]{"Amy","Aliese"};
        
        String result_test1 = MessageFormat.format(test1, argument_test1);
        String result_test2 = MessageFormat.format(test2, argument_test1);
        String result_test3 = MessageFormat.format(test3, argument_test1);
       // String result_test4 = MessageFormat.format(test4, argument_test1);
        
        
        System.out.println(test1+ "------->" +result_test1);
        System.out.println(test2+ "------->" +result_test2);
        System.out.println(test3+ "------->" +result_test3);
       // System.out.println(test4+ "------->" +result_test4);
    }

结果演示

在这里插入图片描述

但是String test4 = “{{0}} is my frided,and {{1}} is my fridend.”;里面因为包含
{ 。所以会报错

在这里插入图片描述

3.单引号（俩个代表一个）

public static void test3() {
        String test1 = "'{0}' is my frided,and '{1}' is my fridend.";
        String test2 = "''{0}'' is my frided,and ''{1}'' is my fridend.";
        String test3 = "\'{0}\' is my frided,and \'{1}\' is my fridend.";
        
        Object[] argument_test1 = new Object[]{"Amy","Aliese"};
        
        String result_test1 = MessageFormat.format(test1, argument_test1);
        String result_test2 = MessageFormat.format(test2, argument_test1);
        String result_test3 = MessageFormat.format(test3, argument_test1);
        
        
        System.out.println(test1+ "------->" +result_test1);
        System.out.println(test2+ "------->" +result_test2);
        System.out.println(test3+ "------->" +result_test3);
    }

结果演示

在这里插入图片描述