文字列オブジェクトを作成する6つの方法(java)

1485 ワード

package javaBasic;

public class StringConstruction {
	public static void main(String[] args) {
		String str0 = new String("HelloJava");//0.String(String original)       String  ,              ;     ,                。 
		char chars1[] = {'j','a','v','a'};
		char chars2[] = {'H','e','l','l','o','j','a','v','a'};
		String str11 = new String(chars1);//①String(char[] value)       String ,                      。 
		String str12 = new String(chars2,5,4);
		/*②String(char[] value, int offset, int count)       String ,                  。
		             str2*/
		byte asc1[] = {106,97,118,97};
		byte asc2[] = {72,101,108,108,111,106,97,118,97};
		String str21 = new String(asc1);//③String(byte[] bytes)                           String 。
		String str22 = new String(asc2,5,4);//④String(byte[] bytes, int offset, int length)                          String 。
		String str31 = new String();//String()        String  ,         。 
		StringBuffer sb = new StringBuffer("HelloJava");
		String str32 = new String(sb);
		System.out.println("str0:"+str0);
		System.out.println("str11:"+str11);
		System.out.println("str12:"+str12);
		System.out.println("str21:"+str21);
		System.out.println("str22:"+str22);
		System.out.println("str31:"+str31);
		System.out.println("str32:"+str32);
	}
}