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// 使用 java 7 排序
private void sortUsingJava7(List<String> names){
Collections.sort(names, new Comparator<String>() {
@Override
public int compare(String s1, String s2) {
return s1.compareTo(s2);
}
});
}
// 使用 java 8 排序
private void sortUsingJava8(List<String> names){
Collections.sort(names, (s1, s2) -> s1.compareTo(s2));
private void sortUsingJava7(List<String> names){
Collections.sort(names, new Comparator<String>() {
@Override
public int compare(String s1, String s2) {
return s1.compareTo(s2);
}
});
}
// 使用 java 8 排序
private void sortUsingJava8(List<String> names){
Collections.sort(names, (s1, s2) -> s1.compareTo(s2));
}
public static void main(String args[]){
List<String> names1 = new ArrayList<String>();
List<String> names2 = new ArrayList<String>();
test tester = new test();
System.out.println("使用 Java 7 语法: ");
Date start1 = new Date();
tester.sortUsingJava7(names1);
Date end1 = new Date();
System.out.println(names1 + "时间" + (end1.getTime()-start1.getTime()) + " ms");
System.out.println("使用 Java 8 语法: ");
Date start2 = new Date();
tester.sortUsingJava8(names2);
Date end2 = new Date();
System.out.println(names2 + "时间" + (end2.getTime()-start2.getTime()) + " ms");
}
运行结果