java StringBuilder 和String怎么转换
时间: 2024-05-18 22:16:29 浏览: 115
在Java中,我们可以通过不同的方法将StringBuilder和String进行转换。首先,让我们看一下将String转换为StringBuilder的方法。其中一种方法是通过使用StringBuilder的构造方法,将String作为参数传递给它,例如:
String s = "abc";
StringBuilder sb = new StringBuilder(s);
另一种方法是先创建一个空的StringBuilder对象,然后使用它的append方法将String添加到其中,例如:
String s = "abc";
StringBuilder sb = new StringBuilder();
sb.append(s);
接下来,让我们来看一下将StringBuilder转换为String的方法。最简单的方法是直接调用StringBuilder的toString()方法,它将返回一个String类型的结果,例如:
StringBuilder sb = new StringBuilder("abc");
String sb1 = sb.toString();
综上所述,我们可以通过使用StringBuilder的构造方法或append方法将String转换为StringBuilder,而使用toString()方法将StringBuilder转换为String。这样就可以方便地在两种类型之间进行转换了。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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