将字符串数组元素插入到列表中

Question

我想使用提供的 2D 字符串数据数组创建所有者及其属性的数组列表。我不知道如何转换字符串以使它们成为所有者列表。我需要首先检查所有者列表是否为空，如果是，请将所有者名称添加到列表中。

import java.util.ArrayList;
import javax.swing.JOptionPane;
public class PropertyTest {
public static void main(String[] args) {
boolean present = true;
ArrayList <Owner> ownerList = new ArrayList <Owner>();
String dataArray[][] = {{"Jones","Commercial","123 Mitchell","Arlington","Texas","76019","120000", "sales", "21000"},
{"Smith","Residential","61 Bose Lane","Dallas","Texas","75002","310000", "65656"},
{"Jones","Commercial","2500 West Seventh St"," Fort Worth","Texas","76015","575000","food", "15750"},
{"Smith","Commercial","1225 Green Rd","Euless","Texas","76000","215500","entertainment","9500"},
{"Jones","Residential","5214 Linda Lane","Houston","Texas","77700","195775", "98541"}};

Answer 1

此代码将帮助您获得正确的输出。 如果我以这个字符串数组为例：java

public <T> List<T> twoDArrayStringToList(T[][] dataArray) {
List<T> list = new ArrayList<T>();
for (T[] array : dataArray) {
list.addAll(Arrays.asList(array));
}
return list;
}
public static void main(String args[]){
String dataArray[][] = {{"Jones","Commercial","123 Mitchell","Arlington","Texas","76019","120000", "sales", "21000"},
{"Smith","Residential","61 Bose Lane","Dallas","Texas","75002","310000", "65656"},
{"Jones","Commercial","2500 West Seventh St"," Fort Worth","Texas","76015","575000","food", "15750"},
{"Smith","Commercial","1225 Green Rd","Euless","Texas","76000","215500","entertainment","9500"},
{"Jones","Residential","5214 Linda Lane","Houston","Texas","77700","195775", "98541"}};
System.out.println(twoDArrayStringToList(dataArray));
}

[琼斯， 商业， 123 米切尔， 阿灵顿， 德克萨斯州， 76019， 120000， 销售， 21000， 史密斯， 住宅， 61 Bose Lane， 达拉斯， 德克萨斯州， 75002， 310000， 65656， 琼斯， 商业， 2500 西第七街， 沃思堡， 德克萨斯州， 76015， 575000， 食品， 15750， 史密斯， 商业， 1225 Green Rd， 尤莱斯， 德克萨斯州， 76000， 215500， 娱乐， 9500， 琼斯，住宅， 5214 琳达巷， 休斯顿， 德克萨斯州， 77700， 195775， 98541]

Answer 2

我相信这个函数可以帮助你

public String[] addString (String[] a , String c){
List<String> list = new ArrayList<String>();
if (a == null){
list.add(c);
String[] b = new String[list.size()];
for (int j = 0 ; j<list.size() ; j++){
b[j] = list.get(j);
}
return b;
}else {
for (int i = 0 ; i<a.length ; i++) {
list.add(a[i]);
}
list.add(c);
String[] b = new String[list.size()];
for (int j = 0 ; j<list.size() ; j++){
b[j] = list.get(j);
}
return b;
}

}

使用 for() 添加数组