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Merge pull request Snailclimb#324 from CarGod/patch-1

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`@@ -150,7 +150,7 @@ JRE 是 Java运行时环境。它是运行已编译 Java 程序所需的所有`
`150`	`150`	`## 8. 字符型常量和字符串常量的区别?`
`151`	`151`
`152`	`152`	`1. 形式上: 字符常量是单引号引起的一个字符; 字符串常量是双引号引起的若干个字符`
`153`		`-2. 含义上: 字符常量相当于一个整形值( ASCII 值),可以参加表达式运算; 字符串常量代表一个地址值(该字符串在内存中存放位置)`
	`153`	`+2. 含义上: 字符常量相当于一个整型值( ASCII 值),可以参加表达式运算; 字符串常量代表一个地址值(该字符串在内存中存放位置)`
`154`	`154`	`3. 占内存大小字符常量只占2个字节; 字符串常量占若干个字节(至少一个字符结束标志) (注意: char在Java中占两个字节)`
`155`	`155`
`156`	`156`	`> java编程思想第四版:2.2.2节`

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