Android-如何正确地将字符串解析为浮点(价格数字格式:整数、小数或两者兼有)
我试图解析来自用户的输入字符串并将其转换为浮点Android-如何正确地将字符串解析为浮点(价格数字格式:整数、小数或两者兼有),android,floating-point,number-formatting,decimalformat,Android,Floating Point,Number Formatting,Decimalformat,我试图解析来自用户的输入字符串并将其转换为浮点 String[] inputs = { "100", "100.0", "100.00", "100.00000", "100.1", "100.10", "100.11", "100.111", "1.0", "0.1",
String[] inputs = {
"100",
"100.0",
"100.00",
"100.00000",
"100.1",
"100.10",
"100.11",
"100.111",
"1.0",
"0.1",
"0.10",
"0.1000",
"0.111",
"100,00",
"1,000.15"
};
for (String input : inputs) {
try {
input = input.replace(",", ".");
Float value = Float.valueOf(input);
if (value == 0F) {
Log.d("APP", "--> NOPE: " + value);
continue;
}
String oldInput = input;
DecimalFormat dc = new DecimalFormat(value > 1F ? "#.00" : "#0.00");
input = dc.format(value);
value = Float.valueOf(input);
Log.d("APP", oldInput + " -> " + value);
}
catch (NumberFormatException e) {
e.printStackTrace();
}
}
这给了我以下输出:
100 -> 100.0
100.0 -> 100.0
100.00 -> 100.0
100.0000 -> 100.0
100.1 -> 100.1
100.10 -> 100.1
100.11 -> 100.11
100.111 -> 100.11
1.0 -> 1.0
0.1 -> 0.1
0.10 -> 0.1
0.1000 -> 0.1
0.111 -> 0.11
100,00 -> 100.0
当我得到如下输入字符串时出现问题:
1,000.25
java.lang.NumberFormatException:引发多点
异常
1000.25
是否为有效输入?(货币来自美国?)float result = Float.parseFloat(string.replaceAll(",", ""));
,
要设置格式,请在替换字符后使用replace1000.25将其删除,该字符为1.000.25,不是有效的浮点,如果“,”只是一个可视分隔符,则可以更改input=input.replace(“,”,”)
toinput=input.replaceAll(“,”,”)代码>