straccesstest.java

Java程序设计培训教程2

public class StrAccessTest{
	String sourceStr = "There is a string accessing example.";
	int leng    = sourceStr.length();
	char chObj  = sourceStr.charAt(16);
	int firstChar1 = sourceStr.indexOf('r');
	int lastChar1  = sourceStr.lastIndexOf('r');
	int firstStr1  = sourceStr.indexOf("ing");
	int lastStr1   = sourceStr.lastIndexOf("ing");
	int firstChar2 = sourceStr.indexOf('e',15);
	int lastChar2  = sourceStr.lastIndexOf('e',15);
	int firstStr2  = sourceStr.indexOf("ing",5);
	int lastStr2   = sourceStr.lastIndexOf("ing",5);
	char[] charArray = new char[8];
	public void getStr(){
		sourceStr.getChars(10,15,charArray,0);
	}
		
	public static void main(String args[]){
		StrAccessTest classObject = new StrAccessTest();
		classObject.getStr();
		String strObj = new String(classObject.charArray);
		System.out.println("String:" + classObject.sourceStr);
		System.out.println("length:" + classObject.leng);
		System.out.println("char at the specified index 16:" + classObject.chObj);
		System.out.println("the first occurrence of 'r':"+classObject.firstChar1);
		System.out.println("sub string from 10 to 15:"+strObj);
		System.out.println("the last occurrence of 'r':"+classObject.lastChar1);
		System.out.println("the first occurence of 'ing':"+classObject.firstStr1);
		System.out.println("the last occurence of 'ing':"+classObject.lastStr1);
		System.out.println("the first occurence of 'e' from index 15:" + classObject.firstChar2);
		System.out.println("the last occurence of 'e' from index 15:" + classObject.lastChar2);
		System.out.println("the first occurence of 'ing' from index 5:" + classObject.firstStr2);
		System.out.println("the last occurence of 'ing' from index 5:" + classObject.lastStr2);
	}
}