我有一个包含这种结构的文本文件:
CRIM:Continuius
ZN:Continuius
INDUS:Continuius
CHAS:Categorical
NOX:Continuius
我将它插入二维数组:
BufferedReader description = new BufferedReader(new FileReader(fullpath2));
String[][] desc;
desc = new String[5][2];
String[] temp_desc;
String delims_desc = ":";
String[] tempString;
for (int k1 = 0; k1 < 5; k1++) {
String line1 = description.readLine();
temp_desc = line1.split(delims_desc);
desc[k1][0] = temp_desc[0];
desc[k1][1] = temp_desc[1];
}
然后尝试确定哪个属性是分类的:
String categ = "Categorical";
for (int i=0; i<5; i++){
String temp1 = String.valueOf(desc[i][1]);
if ("Categorical".equals(desc[i][1])){
System.out.println("The "+k1+ " th is categorical.");
}
}
为什么不返回true
,虽然其中一个属性是分类的?
答案 0 :(得分:3)
查看您发布的输入(在edit perspective中),我看到文本文件的几乎每一行都有很多尾随空格。如果您更换
,您的问题将会消失desc[k1][1] = temp_desc[1];
与
desc[k1][1] = temp_desc[1].trim();
您甚至可以将代码缩短为
for (int k1 = 0; k1 < 5; k1++) {
String line1 = description.readLine().trim();
desc[k1] = line1.split(delims_desc);
}
澄清:
您正在尝试比较
"Categorical" // 11 characters
与
"Categorical " // more than 11 characters
那些不是平等的字符串。