慕仔7135344
2016-11-09 11:28
求6.5最后的练习小程序??
public class CollectiongTest {
/**
* Integer排序
*/
public void testSort1(){
List<Integer> integerList = new ArrayList<Integer>();
Random random = new Random();
Integer k;
for(int i=0;i<10;i++){
do{
k = random.nextInt(100);
}while(integerList.contains(k));
integerList.add(k);
}
System.out.println("------------排序前-----------");
for(Integer integer:integerList){
System.out.println("包含数字:"+integer);
}
Collections.sort(integerList);
System.out.println("------------排序后-----------");
for(Integer integer:integerList){
System.out.println("包含数字:"+integer);
}
}
/**
* 字符串排序
*/
public void testSort2(){
List<String> stringList = new ArrayList<String>();
stringList.add("microsoft");
stringList.add("apple");
stringList.add("google");
stringList.add("huawei");
System.out.println("------------排序前-----------");
for(String string:stringList)
System.out.println("包含字符串:"+string);
Collections.sort(stringList);
System.out.println("------------排序后-----------");
for(String string:stringList)
System.out.println("包含字符串:"+string);
}
/**
* 字符串排序
*/
// 随机生成长度不等的字符串
public void testSort3(){
List<String> stringList = new ArrayList<String>();
Random random = new Random();
Integer k;
for(int i=0;i<10;i++){
do{
k = random.nextInt(10);
}while(k == 0);
String temp = testString(k);
stringList.add(temp);
}
System.out.println("------------排序前-----------");
for(String string:stringList)
System.out.println("包含字符串:"+string);
Collections.sort(stringList);
System.out.println("------------排序后-----------");
for(String string:stringList)
System.out.println("包含字符串:"+string);
}
// 方法返回长度不等的字符串
public String testString(Integer count){
String str = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
StringBuffer sb = new StringBuffer();
int length = str.length();
Random random = new Random();
for(int i=0;i<count;i++){
int num = random.nextInt(length);
sb.append(str.charAt(num));
}
String temp = sb.toString();
return temp;
}
public static void main(String[] args) {
CollectiongTest ct = new CollectiongTest();
// ct.testSort1();
// ct.testSort2();
ct.testSort3();
}
}
你的代码有问题啊 执行不出来
Java入门第三季
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