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import java.util.List; import java.util.ArrayList; import java.util.Set; import java.util.HashSet; public class lzwCode { public static void main(String [] args) { testA(); System.out.println( "===========================" ); testB(); System.out.println( "===========================" ); testC(); } //去掉数组中重复的值 public static void testA() { String [] str = { "Java" , "C++" , "Php" , "C#" , "Python" , "C++" , "Java" }; for (String elementA:str ) { System.out.print(elementA + " " ); } List<String> list = new ArrayList<String>(); for (int i=0; i<str.length; i++) { if (!list.contains(str[i])) { list.add(str[i]); } } /* Set<String> set = new HashSet<String>(); for (int i=0; i<str.length; i++) { set.add(str[i]); } String[] newStr = set.toArray(new String[1]); */ System.out.println(); String[] newStr = list.toArray( new String[1]); //返回一个包含所有对象的指定类型的数组 for (String elementB:newStr ) { System.out.print(elementB + " " ); } System.out.println(); } //删除数组中其中一个元素 public static void testB() { String [] str = { "Java" , "C++" , "Php" , "C#" , "Python" }; for (String elementA:str ) { System.out.print(elementA + " " ); } //删除php List<String> list = new ArrayList<String>(); for (int i=0; i<str.length; i++) { list.add(str[i]); } list.remove(2); //list.remove("Php") System.out.println(); String[] newStr = list.toArray( new String[1]); //返回一个包含所有对象的指定类型的数组 for (String elementB:newStr ) { System.out.print(elementB + " " ); } System.out.println(); } //在数组中增加一个元素 public static void testC() { String [] str = { "Java" , "C++" , "Php" , "C#" , "Python" }; for (String elementA:str ) { System.out.print(elementA + " " ); } //增加ruby List<String> list = new ArrayList<String>(); for (int i=0; i<str.length; i++) { list.add(str[i]); } list.add(2, "ruby" ); //list.add("ruby") System.out.println(); String[] newStr = list.toArray( new String[1]); //返回一个包含所有对象的指定类型的数组 for (String elementB:newStr ) { System.out.print(elementB + " " ); } System.out.println(); } } |
控制台结果:
以上这篇Java数组,去掉重复值、增加、删除数组元素的实现方法就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持服务器之家。