strconstruct.java

初学的好东西值得一看看欢迎下载观看使用

class StrConstruct{
	public static void main(String[] args){
		String s1=new String();
		System.out.println("s1=\""+s1+"\"");
		String s2=new String("Hello World");
		System.out.println("s2=\""+s2+"\"");
		char[] cArray={'a','b','c','z','y','x'};
		String s3=new String(cArray);
		System.out.println("s3=\""+s3+"\"");
		String s4=new String(cArray,0,3);
		System.out.println("s4=\""+s4+"\"");
		byte[] b={51,52,53,54,55};
		String s5=new String(b);
		System.out.println("s5=\""+s5+"\"");
		StringBuffer buffer=new StringBuffer("edit string");
		String s6=new String(buffer);
		System.out.println("s6=\""+s6+"\"");
		byte[] b2=new byte[5];
		String s=new String("mnopq");
		b2=s.getBytes();
		for(int i=0;i<5;i++)
			System.out.println("b2["+i+"]="+b2[i]);
		String s22=new String("abcdefghijklmn");
		char[] tArray=new char[5];
		s22.getChars(3,5,tArray,2);
		for(int i=0;i<5;i++)
			System.out.println("tArray["+i+"]="+tArray[i]);
		String sdd=new String("But it had all worked out for the best.");
		String g=sdd.substring(26);
		System.out.println(g);
		String sff=new String("hello,世事洞明皆学问，人情练达即文章");
		String g1=sff.substring(6,13);
		System.out.println(g1);
		String s1e=new String("abcd");
		String s2e=new String("abcde");
		System.out.println("字符串s1与s2的比较："+s1e.compareTo(s2e));
		String s1kk=new String("Mr Corleone's voice came briskly over the phone.");
		System.out.println(s1kk.endsWith("the phone."));
		System.out.println(s1kk);
		String s1aa=new String("xyzABC");
		String s2aa=new String("XYZabc");
		System.out.println(s1aa.equalsIgnoreCase(s2aa)+"ddd");
		String s1000=new String("yzj12345");
		char[] cArray11={'y','z','j','1','2','3','4','5'};
		String s2000=new String(cArray11);
		System.out.println("s1000与cArray相等否："+s1.equals(cArray11));
		System.out.println("s1000与s2000相等否："+s1000.equals(s2000));

		String s1007=new String("mnopXWYZbefgh");
		String s2007=new String("123XWYZ456");
		System.out.println(s1007.regionMatches(4,s2007,3,4));

		String sttt=new String("0123456789");
		System.out.println(sttt.indexOf('a'));
		String svv=new String("Why don't we go into my study?");
		System.out.println(svv.indexOf('o',7));
		String sbb=new String("Why don't we go into my study?");
		System.out.println(sbb.indexOf("we"));
	
		String sggg=new String("a123a123");
		System.out.println(sggg.lastIndexOf('a'));


		String s343=new String("this is a String");
		System.out.println("字符串s的长度为："+s343.length());

		String s76=new String("Good");
		String u=new String("night!");
		System.out.println(s76.concat(u));

		String s99=new String("那只0生了一个0子");
		System.out.println(s99.replace('0', '鸭'));
		String s90=new String("AbcdeEfG");
		System.out.println(s90.toLowerCase());
		String s221=new String("abcedfghijk");
		System.out.println(s221.toUpperCase());
		String sf55=new String("   mykey is 12345   ");
		System.out.println(sf55.trim());
	}
}