String的构造方法和一般方法
public class StringTest{
public static void main(String[] args){
//1
String s1 = "abc";
//2
String s2 = new String("cdg");
//3
byte[] bytes={98,88,34,25};
String s3 = new String(bytes);
//4String(byte[] bytes, int offset, int length)Constructs a new String by decoding the specified subarray of bytes using the platform's default charse;
String s4 = new String(bytes,1,3);
//5.
char[] c1 = {'我','是','中','国','人'};
String s5 = new String(c1);
System.out.println(s5); //我是中国人
//6.
String s6 = new String(c1,2,2);
System.out.println(s6); //中国System.out.println(s3); //abcd String已经重写了Object中的toString
}
}
/*字符串常用方法
*/
public class StringTest06{
public static void main(String[] args){
//1.char charAt(int index);
String s1 = "我是王勇,是坏人!";
char c1 = s1.charAt(2);
System.out.println(c1); //王
//2.boolean endsWith(String endStr);
System.out.println("HelloWorld.java".endsWith("java")); //true
System.out.println("HelloWorld.java".endsWith(".java")); //true
System.out.println("HelloWorld.java".endsWith("HelloWorld.java")); //true
System.out.println("HelloWorld.java".endsWith("txt")); //false
System.out.println("HelloWorld.java".endsWith("java ")); //false
//3. boolean equalsIgnoreCase(String anotherString);
System.out.println("abc".equalsIgnoreCase("ABc")); //true
//4.byte[] getBytes();
byte[] bytes = "abc".getBytes();
for(int i=0;i
新闻标题:String的构造方法和一般方法
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