用android中的字符串中的另一个字符替换字符？ [英] Replacing a character by another character in a string in android?

问题描述

我想在android中替换另一个角色..
我的代码：

Simply i want to replace a character with another in android.. My code:

et = (EditText) findViewById(R.id.editText1);
String str = et.getText().toString();
str.replace(' ','_');
et.setText(str);
System.out.println(str);

但是这里的空格并没有被下划线取代..我也试过了其他角色..

But here the "space" is not replaced by "underscore".. I also tried other character too..

请帮助!!

推荐答案

字符串是不可变的Java - replace 不会更改现有字符串，而是返回一个新字符串。你想要：

Strings are immutable in Java - replace doesn't change the existing string, it returns a new one. You want:

str = str.replace(' ','_');

（这绝对是重复的，但我现在没有足够的时间找到合适的一个......）

(This is definitely a duplicate, but I don't have enough time right now to find an appropriate one...)

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