substring.java

来自「《Java面向对象程序设计》例子源代码.轻松学习书本.」· Java 代码 · 共 16 行

//SubString.java
import javax.swing.*;
public class SubString {
   public static void main( String args[] ){
      String letters = "abcdefghabcdefgh";
      //调用substring方法在字符串中提取一个子字符串
      String output = "Substring from index 10 to end is " +
         "\"" + letters.substring( 10 ) + "\"\n";
      output += "Substring from index 3 up to 6 is " +
         "\"" + letters.substring( 3, 6 ) + "\"";
      JOptionPane.showMessageDialog( null, output,
         "字符串截取", JOptionPane.INFORMATION_MESSAGE );
      System.exit( 0 );
   }
}