小弟我写了一个java的直接插入排序算法，有点异常。希望帮小弟我改正一下，并指出异常之处。多谢

我写了一个java的直接插入排序算法，有点错误。希望帮我改正一下，并指出错误之处。谢谢。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Sort extends JFrame
{
JButton output;
  JTextField input;
JTextArea outnum;
String s;
public Sort()
{
super("排序");
setSize(500,100);
setLocation(300,300);

  Container c=getContentPane();
c.setLayout(new FlowLayout(FlowLayout.CENTER));
input=new JTextField(24);
output=new JButton("排序");
output.addActionListener(new SortHandler());
outnum=new JTextArea(1,30);
outnum.setBackground(Color.cyan);
c.add(input);
c.add(output);
c.add(outnum);

setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args)
{
new Sort();
}
  public void sortFun(String[] a,int n)
{
try
{
for(int x=1;x<n;x++)
{
int temp,z;
temp=Integer.parseInt(a[x]);
z=x-1;
while(z>=0&&temp<Integer.parseInt(a[x]))
{
a[z+1]=a[z];
z--;
}
a[z+1]=a[z];
}
for(int i=0;i<n;i++)
  outnum.append(a[i]+" ");
}
catch (Exception e)
{
System.out.println(e.getMessage());
}
}
  public class SortHandler implements ActionListener
  {
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==output)
{
outnum.setText("");
  String string=input.getText();
String[] str=string.split(" ");
int sum=str.length;
sortFun(str,sum);
}
}
  }
}

------解决方案--------------------
public void sortFun(String[] a, int n)这个方法中排序算法错了！
换成下面的！

public void sortFun(String[] a, int n) {
try {
for (int x = 0; x < n; x++) {
for (int y = x; y < n; y++){
int x1 = Integer.parseInt(a[x]);
int y1 = Integer.parseInt(a[y]);
String temp;
if (x1 > y1){
temp = a[x];
a[x] = a[y];
a[y] = temp;
}
}
}
for (int i = 0; i < n; i++)
outnum.append(a[i] + " ");
} catch (Exception e) {
System.out.println(e.getMessage());
}
}
------解决方案--------------------

Java code

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Sort extends JFrame {
    JButton output;

    JTextField input;

    JTextArea outnum;

    String s;

    public Sort() {
        super("排序");
        setSize(500, 100);
        setLocation(300, 300);

        Container c = getContentPane();
        c.setLayout(new FlowLayout(FlowLayout.CENTER));
        input = new JTextField(24);
        output = new JButton("排序");
        output.addActionListener(new SortHandler());
        outnum = new JTextArea(1, 30);
        outnum.setBackground(Color.cyan);
        c.add(input);
        c.add(output);
        c.add(outnum);

        setVisible(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new Sort();
    }

    public void sortFun(String[] a, int n) {
        try {
            for (int x = 0; x < n; x++) {
                int temp, z;
                temp = Integer.parseInt(a[x]);
                z = x - 1;
                while (z >= 0 && temp < Integer.parseInt(a[z])) {//这里从0开始
                    a[z + 1] = a[z];
                    a[z]=String.valueOf(temp);//这里实现互换
                    z--;
                }
                //a[z + 1] = a[z];这里不需要这样
            }
            for (int i = 0; i < n; i++)
                outnum.append(a[i] + " ");
        } catch (Exception e) {
            System.out.println(e.getMessage());
        }
    }

    public class SortHandler implements ActionListener {
        public void actionPerformed(ActionEvent e) {
            if (e.getSource() == output) {
                outnum.setText("");
                String string = input.getText();
                String[] str = string.split(" ");
                int sum = str.length;
                sortFun(str, sum);
            }
        }
    }
}