我有一个多维String数组过程[100] [2],如下所示:
B
D
乙
B C
E
Y
D
X
G
我想在第一列字母上对其进行排序,以便最终结果看起来像这样:
乙
B C
D
Y
G
E
D
B
X
我试过使用下面的代码,但这不能解决问题:
Arrays.sort(process, new Comparator<String[]>() {
@Override
public int compare(final String[] entry1, final String[] entry2) {
final String time1 = entry1[0];
final String time2 = entry2[0];
return time1.compareTo(time2);
}
});
我得到的输出是:
乙
B C
D
Y
E
B
G
D
X
最佳答案
以下单元测试演示了有效的Comparator
实现。测试也会打印出结果。
import java.util.Arrays;
import java.util.Comparator;
import junit.framework.TestCase;
public class ArrayTest extends TestCase {
public class Sorter implements Comparator {
public int compare(Object o1, Object o2){
String[] arrayOne = (String[])o1;
String[] arrayTwo = (String[])o2;
return arrayOne[0].compareTo(arrayTwo[0]);
}
}
public void testSort() {
String[][] testData = {
{"Y", "B"},
{"C", "D"},
{"A", "B"},
{"B", "C"},
{"F", "E"},
{"E", "Y"},
};
Arrays.sort(testData, new Sorter());
String[][] expectedOutput = {
{"A", "B"},
{"B", "C"},
{"C", "D"},
{"E", "Y"},
{"F", "E"},
{"Y", "B"},
};
for(int i = 0; i < testData.length; ++i) {
System.out.println(testData[i][0] + " " + testData[i][1]);
assertEquals(expectedOutput[i][0], testData[i][0]);
assertEquals(expectedOutput[i][1], testData[i][1]);
}
}
}
关于java - 用Java对多维字符数组进行排序,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/5889304/